Oh wow, yeah, this is working so much more smoothly now!
Now that I'm actually able to get my old files loaded into the new version proper, I am noticing one issue that was really prevalent in the old one still around: When you switch poses, the faces can get... squished, I guess? Here's what I mean in both the new build and the current stable build:
On the left is the expression I made, and on the right is how it looks just by changing the pose to another one.