Ditto the voting system.
I support replacing our winner takes all (first past the post) elections with approval voting. Maybe as a step towards PR. But we'll always have executive races that'd benefit.
Benefits
* super easy to explain, administrate
* per Duverger's Law, would end our two party system
* eliminates separate primary elections
* reduces voter fatigue
* reduces admin costs
* greatly reduce mudslinging, because everyone wants to be your second choice
https://en.wikipedia.org/wiki/Approval_votinghttps://en.wikipedia.org/wiki/Duverger%27s_law
Note: I prefer approval to the slightly mathematically superior score voting, we'd get most of the benefits but much more simple.