* IRV or approval voting in the Presidency/executive
* Multi-member districts in the House.
MMD in the House, by State, would effectively end gerrymandering - there is no way state borders will change radically enough to affect electoral results. Combine that with breaking the two party duopoly and it's a huge win.
Side note: I know you don't (nor probably anyone in this thread; HN has fewer trolls) have any intention of subverting the idea, but when people online are supporting electoral reform of ANY kind, the first response should be "I agree".
I agree with electoral reform, and my ideas are X, Y, and Z.
If people squabble too early, it kills momentum. Furthermore, perhaps 1% of the population gives a damn about voting systems and its impact on the country. The rest don't know about it, or are part of the private powerhouse organizations known as the Republican National Committee and Democratic National Committee.
Support electoral reform first, then discuss options.