Government changes exactly how much a populace forces it too. The big thing I would change that seems plausible is campaign finance reform. Specifically I find Citizens United to be one of the worst decisions in recent Supreme Court history. Money corrupts every government in every culture. Putting restrictions is how we keep it in check. Right now the billionaires of the US can influence policy in such a sway that makes results or parties irrelevant.
Now, I'm all for more proportional representation and term limits, but I think the goal short term should be a focused effort to overturn a terrible decision.