I'm not going to spoil myself on what's exactly in the Galar dex (and please spoiler tag that stuff), but species clause is a good one to discuss regardless. I also thought Flint mentioned something about switching Ability clause from two instances to a single instance? Invesitgating how Dynamax moves and the like work on non-Dyna Pokemon should also be a priority since that can be super meta defining.
Also ban all ubers. Lets do it this time!