I tested the team on PS, and while I'm on the low ladder and showdown bugged my Choice Scarf, making me not get the speed boost (which cost me two games) I can already see the problems that this team has. First of all, Toxicroag is just too slow and frail for OU and lacks coverage. It can't even set-up safely on Ferrothorn as even Power Whip can break its subs on one hit. IMO, he really needs to go as he can only really put in some work in very few matches. Swampert also isn't as good as you guys might think, it's actually two hit KOed by many 'mons and doesn't do enough damage to them. We will probably need another SR. Politoed really NEEDS someone else that can set-up rain, and Ludicolo can't do this job. In the rain that thing is a true MVP, but outside of it it can't do anything most of the times, so setting up rain with it is a no no. Magneton needs a scarf, amd full speed investment, as this team is just really slow and we need something that can actually outspeed Excadrill without needing rain. Gyarados and Ludicolo are the MVPs but we need something to check bird spam (no, Magneton doesn't check it as it takes too much damage during the matches) and 'mons that can take electric attacks with ease.
To be honest, half of the team is really good, while the other half really brings it down.
Some threats are: Greninja, Landorus, Manectric, Thundurus, Ferrothorn, Talonflame and anything that is fast and can hit hard.