A feature in the new games that's really helpful is to see the stat changes of Pokemon while in battle. I haven't been playing long so this may already be a thing that I haven't seen, but it would be really nice to be able to hover your mouse on a battling pokemon (or clicking their sprite on mobile) in order to see the Pokemon's current stat changes for instance I use Iron Defense and if I hover over my Geodude I can see the plus 2 to Def.