Republicans aren't 100% gun ho about trumps recent (and easily foreseen) fuck ups.
If we replace First-past-the-post voting, we could easily see the republican party get replaced with a more reasonable conservative party like the democrats.
Plus, you know, screaming at people unrepresented in government to vote for your preferred political party isn't actually democracy.
Alaska is an interesting place, politically. Last I knew, the major parties there were Libertarian Republicans and the Green Party. I'm not surprised they have a different voting system.
The electoral reforms would certainly help, but you risk the Trudeau effect of a candidate running on them, then getting in office and saying, "Well, it can't be that broken if I still managed to win."