If Republicans can cut out the cancer of Trumpism, “corporatist” Republicans from the northeast and midwest might be able to ally with “quasi-libertarian” Republicans from the west and save the GOP. But that's a big if.
Ranked choice voting is a good option, but it does tend to slow things down in terms of getting results. A few cities in Minnesota use it for local races, but I don’t think any of them are yet using it for the Presidential race.