You haven't seen all the animations yet, there are new animations, it's not just wingull
The textures will improve until release, it's ridiculous to focus on that tree, it's a placeholder, it's usually the last thing devs improve
You don't know how many new Pokemon there are, you don't know if it's less than Alola, there might be many more, you don't know
You don't know if there isn't a post game, they will probably have a big post game now that they don't have so many Pokemon, let's wait until release
You don't know if there aren't new features besides Dynamaxing and camping, they haven't showed the full game yet, they said the cut would help them put more features in the game, there might be many more, you don't know
You don't know how many old Pokemon will be returning, it could be most of them, probably close to S/M total number, let's wait until we see the whole Dex
Well, you don't know if they won't have everything we wanted for this game in the next one, they are probably developing it right now and it's gonna be the HD core game everybody wanted, maybe they will have a bigger Dex and more returning Pokemon, just wait 5 years so we can see it and judge on that, you don't know.