I'm limited to my phone for a few days so I'll try to make this as short and sweet as possible.
Yeah, no. I'm going to break down your whole argument into three points, as the rest of it is pretty nonsensical and "cute":
No, you just don't know how to argue against the rest of it.
Base 113 Speed is really good and fits the tier well; outside of Greninja (who is likely to be banned soon), the only non-Mega OU Pokemon that outspeeds Serperior is Talonflame: Base 113 speed may seem good, until you factor in that literally everyone has a mega on their team in OU and there are way more pokemon that can outspeed and kill it or take a hit off it and kill it. Choice scarfers are also quite common, and in the higher tiers you'd be hard pressed to find a team that doesn't contain at least one scarfed pokemon who doesn't fear it
Dude, base 113 Speed is good. The fact that you can outrun it with one of a few super fast Megas (who carry a hefty opportunity cost of their own) or a Scarf user does not diminish that. Heck, one of the biggest reasons that Greninja is being suspected is because of its Speed, and it beats basically nothing that Serperior can't outside of a couple slower Scarf users like Tyranitar. The fact that it can be revenge killed means little when all offensive Pokemon have to deal with that. In addition, one of its biggest niches is as a wallbreaker, and it functions best against the kinds of teams that
don't have a lot of these faster things. The extra speed lets it threaten offensive teams more, but that doesn't mean that it's shoehorned into beating offense. Not only that, but Serperior is harder to actually bring a revenge killer on. You can't just try to come in safely on a boosting move because Serperior's boosting move just happens to be its most powerful STAB move. And hey, if you're waiting for Serperior to kill something every time you bring in a Scarf user, I'm just fine with that.
Serperior's Special Attack may be low, but it hardly matters when you can throw around 130 BP STABs and get a free Nasty Plot boost with it: Yes, yes it does. Serperior's special attack isn't just low, if it is used in OU it'd be one of the lowest in the tier (in the top 50 pokemon used in OU, only mandibuzz sableye (tied in attack) and chansey have lower to or equal offenses, in the top 100 only umbreon smeargle and shuckle also have lower). Even with free Nasty Plot boosts and a 130BP stab, this thing lacks an actual movepool to abuse it with. Dragon pulse/hidden power choice may seem like it could put a dent in things, until you come to realise that dozens of other special attackers have far superior starting offenses and better movepools to abuse it with (things like latia/os, volcarona, and even togekiss).
Sounds like a lot of blind theorymon to me. If you'd played with Serperior at all in last generation's Dream World OU, you'd know that Serperior's ability to boost up with Leaf Storm more than makes up for the low SpA stat (hint: base 75 SpA was no more impressive last generation than it is now). I honestly don't give a crap about other special attackers because they can't boost their SpA two stages just by spamming their best STAB move.
Also, did I forget to mention the 75/95/95 defenses? Here's what a max-attack adamant expert belt fletchling does to it:
252+ Atk Expert Belt Fletchling Brave Bird vs. 28 HP / 0 Def Serperior: 302-355 (101.3 - 119.1%) -- guaranteed OHKO
Lol and you said I was being cute. First, that means squat because it does almost the same thing to freaking Keldeo and second, Fletchling doesn't learn Brave Bird rofl.
It would have been a lot better last generation when there weren't all those fast Megas around to outrun it and so many of Serperior's key moves weren't nerfed: This is one point I actually agree on, but for a different reason. Last gen, when weather lasted infinitely and the metagame was "Grass-friendly", Serperior had a chance to shine as being one of the few mono-typed grass types capable of holding its own regardless of what sort of weather was put upon it (as a set of glare/leaf storm/hp-rock/leech seed could do wonders). Sadly, sixth gen came around and Gamefreak decided to either nerf or utterly ruin everything that was dragon or grass by adding a bunch of new fairy types and making a bunch of new pokemon viable who oddly enough resist grass (which is kinda ironic with mega-sceptile being pretty badass in RU).
The metagame was kind to
bulky Grasses since they could actually take Rain-boosted hits in the long run. Serperior was not one of those. Just look at some of the big Rain abusers. Serperior sucked against Hurricane spam, and it wasn't too fond of Toxicroak either. Starmie just killed it with Ice Beam, Thundurus-T could easily survive its hits and KO with HP Ice, and Jirachi either crippled with paralysis or set up on Serperior with Calm Mind. Even things like Keldeo and Rotom-W are just as common now as they were back then, and they're arguably even less of a threat to Serperior since it doesn't have to worry about Rain-boosted STABs. So no, the lack of permanent weather is not the major detriment to Serperior. New fast threats are far more of an issue, as are new checks in general.
On a side note, I'm not sure why you mentioned Fairies and such because Serperior is not a Dragon-type. Not to mention that the only really common Fairy that actually resists Grass is Mega Altaria.
They also added something called "Malamar" who at the beginning of 6th gen was in the same boat as serperior. Malamar had contrary, access to superpower, a base 92 attack stat (17 points higher than serperior), and access to a bunch of moves that separated it from other pokemon. Then people tried it. While gaining boosts off attacking seemed good, it still lacked that "tiny amount of power" to outright kill things even after a boost. It also had 86/88/75 defenses (similar to serperior's) which did it no favors especially when combined with the fact it was one of few dark types without accses to prioritay. That isn't to say Serperior can't make a splash in OU, I just really don't see it happening as when factoring in its small offensive movepool, competition by other grass types, weak base offensive stats, average-at-best defensive stats, and lack of priority, it just isn't meant to be.
Lol, please do not compare Serperior to Malamar. Malamar has a sucky speed tier, it has no resistances with only one immunty, it can't boost its power as quickly because Superpower only boosts by +1 per hit, and it's respective "boosting" move is far weaker due to it not getting STAB. But most importantly, again, is that speed stat. I mean, have you seen what going from base 70 to base 110 Spe has done for Mega Metagross? If Malamar has base 113 Speed, it'd easily be far more successful than it is right now.
I'm sensing that you're talking entirely out of theorymon. Last generation's OU wasn't much kinder to Serperior, yet it performed admirably in Dream World OU. In addition, I've talked to several players far better than myself on IRC who have praised its performance in custom matches based on the current metagame + Contrary Serperior. Go look at some of the Smogon discussion threads and you can probably find some of these players talking about their experience with Serperior.
Again, I don't think this thing will take the metagame by storm, but you'd have to be downright crazy to think it won't rise above NU, especially when I just said that NU leaders are already considering suspecting or quickbanning it once it's released.
