ITT: Shit you want streamlined or added in Gen 8. Keep it to mostly QOL reasons but anything's welcome. I'll start.
Make alternate evolution methods for Eevee. If I'm looking to get a particular Eevee evolution I've always gotta do that arbitrary bullshit. Level it up during a specific time of day with Max happiness. Level it up with 2 hearts in Amie with a fairy move. Level it up near some fucking rock. They have ice stones, leaf stones, dusk stones, and dawn stones, yet none get used for the evolution Pokemon. You would obviously keep all the other bullshit since there's gonna always be the people who'll get mad if the old way is completely cut(myself included) but just make it so it doesn't have to be so time consuming and random.