I agree with most of this post but disagree with the point about about new things being stronger. Namely Palafin vs Dracovish which isn’t a good comparison. Dracovish is closer to Last Respects Houndstone, which is more busted than Fishious Rend for sure. Palafin imo is more comparable to Urshifu-R and the hypothetic Illuminate Regigigas. Additionally Flutter Mane is a near straight upgrade from Spectrier.You know, I've thought about it for a while and I believe the reason why this generation has so many bans or 'overpowered' pokemon is a combination of power creep and anti-power creep. Sure, we have stuff like chi yu and flutter mane which are insanely powerful, but the returning pokemon have also been severly nerfed. Just look at lando-t, it would absolutely be a lot better if it retained the tools it had before in gen 8 and most likely not have almost fallen to uu. The new pokemon haven't been overwhelmingly better than additions in previous gens, remember in gen 8 when we got spectrier and dracovish? If you think palafin had absurd power, just calc dracovish fishious rend. (Tbh, I know that the bulk up taunt set was what truly broke palafin, but this is more to be a power comparison.) Something like urshifu rapid strike could have been balanced if other pokemon had their full movesets (I'm basing this off N-Dex, which while it isn't the best measurement on brokeness, should be used as a tertiary arguement, which is why I considered adding roaring moon to the list, but decided against it because it is banned in N-Dex.) I'm not saying we should unban these mons that were banned in Gen 9, at least until we properly assess if they would be too much for the tier, but it shows how something that was definetely broken, is not in another metagame.
Overall, if game freak hadn't fucked multiple pokemon to the moon and back several times (blissey would like to speak with management about their toxic behaviour), the metagame could have been a lot more balanced.
I’d also like to say that NatDex has more than just expanded movepools as well. You have Z-moves, Megas, and more Pokemon.
Otherwise I agree. Especially for defensive Pokemon. GameFreak gave offense a shiny new car for their 18th birthday, while defense got an eviction notice for their’s.