Well, where do I start in expressing my disappointment for these? First of all, it's massively disappointing that this is, for all intents and purposes, just Pokemon Go on a home console, but not only that it's a home console that costs close to £300 and a game that will cost around £50, if not more. While I get that they're trying to get people playing Go into the mainstream games, I don't think this game will accomplish that at all. Part of the appeal of Go is that it's free, so why would people who play Go for that reason pay £350+ for it just to be able to play it on their TV? The other main aspect of Go that seems to appeal to people is being able to play Pokemon on the go (pun intended). While I guess you can with the Switch (and that new, more obnoxious version of the Pokewalker, if it does indeed make noises like that), it isn't really the same again and kind of defeats the point of playing Go in the first place if you're just lazing around to do so.
Secondly, if this title is intended to serve as a transitional title for Go players between Go and the main games, why not use the proper turn-based battle system for wild Pokemon, rather than just shaking the Joycon to capture stuff? Proper Pokemon battles and capturing are by far the easiest part of the series to grasp, so their exclusion here doesn't really make sense (you could argue that there's no need for such a transition, but I see no reason why there isn't a need for it). Also, I bet some children will break their TVs while trying to capture Pokemon this way, and I'll be shocked if that doesn't happen within the first month. Also, as someone who hates the Go catching mechanics to begin with, it disappoints me that they're being forced upon us in these games.
Thirdly, I wasn't sure how I felt about it before, but this does confirm that I really don't like the idea of overworld Pokemon; it takes away the random nature of wild battles, plus I'm betting it makes it harder to shiny hunt or find good IVs (if those are even a thing in these casual spin-offs). Also, if they try to do this for the core games next year, it seems like a massive drain of resources that could be better spent elsewhere, such as on the story or on new Pokemon, or on just making sure the games are a bit more challenging than usual (I'm really hoping they don't port this idea over to the main games, but it would surprise me if they didn't now).
Also, I feel like the graphics aren't actually very impressive for a home console game, and in fact they almost feel like a step back from the Gen 7 games, not least because of how absurdly childish it looks. I get that there's more able to happen on screen and all with the Switch, but I'm just not impressed on the graphics front at all.
The only thing I do like the look of is local multi-player, even if I'm not quite certain of the practicalities of such a thing; that would be something I would be all too happy to see in the main series games, as it would be much more fun to battle alongside a friend than alongside random NPCs that are forgotten about after temporarily aiding you or you temporarily aiding them (think of all those characters in DPPt, for instance). I'm also curious to see what new Pokemon comes in the games, but that'll be revealed on the internet soon after the games come out (or, more likely, well before release), but that isn't enough on its own.
Basically, as you can probably tell, I am very disappointed by this news and have absolutely no interest in these games whatsoever, and I have to admit I'm more annoyed than I would be if the release of these didn't mean we have to wait a further year to get any concrete Gen 8 news (because this is not Gen 8 at all, given that it's a spin-off with just 1 new Pokemon and that it's essentially Pokemon Go for people too lazy to walk for actual Pokemon Go).