>>41999326New Buddy system is basically Pokemon Amie for Go, you get neat bonuses the more you interact with them and when you reach max friendship they get a cool in-model badge visible to everybody else
They've also added PvE against Team Rocket as part of a game quest which nets you Legendaries and good Pokemon, so there's an incentive to go out of your common route to get them
Community Days (which are a weekend every month) increases shiny chance along adding exclusive moves or featuring new Pokemon
Overall it's way better than the 2016 experience, there's a lot of QoL changes and you can just play the game on your way to your other daily errands