There also needs to be, probably, more party diversity.

The fact that the current president has such a stranglehold over their party is pretty unprecedented; normally, the big tent parties have lots of little camps with power bases that somewhat insulate independence, whether that be on an issue or regional level. It's kind of odd that the disenfranchised members of that party have not started up their own party.

Also, I think the current gerrymandering race to the bottom has pretty clearly demonstrated the need for a better system of voting and district mapping. The House elections are already regulated by congressional act, not by the constitution.