There's score voting too. I believe approval is the best focal point for this kind of reform because it's the simplest one, simpler even than the status quo. (In UI terms it's switching from radio buttons to checkboxes.) Any complication or unfamiliarity is a problem in multiple ways. (Score voting goes from checkbox to a 1-5 stars or whatever.)

I was guarded above because even though system-level reform should be a bigger deal than object-level, I think putting a lot of hope on it is setting yourself up for disappointment. You need culture change or competition in governance.