I finally solved my Mixup Plus cube using the "cube shape, then reduction to 3x3 and parity fix" method (all I needed to look up was returning to the cube shape). But when researching how to fix the bits that the parity fix unsolves, for when I run into it (thanks for the video rline!), I found that there is a simple 3-cycle for solving the "inner edges" (I've always called these "wedges" because of their shape and how they're wedged in between the other pieces).
So next time I solve my Mixup Plus I'm going to try doing a "wedges last" solution.
But anyway I'm posting this in this particular topic because wedges last would make a lot of sense for a Mixup Plus Kites if Oskar were to ever make one...
But there is still the problem of solving the original non-plus version first in either case. I like the idea of "permute first, ask questions later
orient second" in theory but I think in practice it might be too difficult compared to orienting as you go.
It also occurred to me that if you wanted to make this easier, you could sticker it as if it were a Mixup Cube, putting four shades of red on one "face", four shades of blue on another, and so on. But that seems like missing the point.
As much as I dislike simulator programs compared to the real thing... is there anyone who can whip one up for this puzzle?