RCV didn't take anything from the R's in Alaska. It's just that the R's decided to run a hilariously bad candidate that the majority of R's didn't even want, and so a bunch of R's voted D. They lost, as they should when you do that. It worked as designed. It's a good thing when parties are punished for bad candidates and bad policy, and things aren't just a us or them.
This time around, with a candidate that people actually like, they'll very likely win. The horror of having to run candidates people actually want to vote for instead of just pointing at the other said and saying look how bad they are.
If you think about RCV logically, what it tends to do is reward people in the middle at the expense of the extremes. While first past the post does the opposite.
One thing open primaries does is prevent defacto coups like we had with Kamala replacing Biden at the whim of the party. Because the party has no control of anything when it comes to the primary, who is running or the election. Political parties are anathema to democracy, so anything we can do to remove their power is a good thing.
