To be honest, I reached that point during gen 4...
My concern is that if they keep adding around a hundred or so each gen then not only does it make it harder to remember them, it also makes it harder to complete your Pokédex - not to mention that it lessens the chances of Gamefreak including the national dex.
I'd be happy if they just stuck to new variations of existing Pokémon i.e. mega evolutions and region specific appearances like Alola and Galar Pokémon.
Yeah, I just imagine it's going to get harder over the years each time they have to come up with ~100 new designs when they're already having to come up with unique gameplay features to set their Gen apart from everything before it. There were Megas, then Z-Moves, now they turn into Macy's parade balloons. What will the next gimmicks be, and can they keep adding around a hundred new mon each time without the ideas getting crappier?
and seems like they are just being hushed by their bosses to quickly get some ideas and push it out to the new version. perhaps they release versions far too quickly and coming out w new creative ideas really takes time (I know it as I do designing too but not pokemon), sometimes when your bosses pushes you, you just make do with a certain design and let them QC and most probably if they need to launch that project / game, they will make do with the "best" design and push it forward too.