Bare, Sophie, materials for the body skin, materials for Doll Parts, Marlene, nails (standalone packs, there's a couple out there now.) So far it's been reported Bare and some of the nails aren't working.
...though Legacy support says appliers still work on the demo body, so I could try this myself with a demo. It's just unfortunate since they DID work for me, I don't release without testing, and I just assumed if they're in the StyleHud and working for me they must be good
My current theory is the script that Legacy provides to bulk configure for the entire applier breaks things. Since I didn't use it on the rebuild and now it's working.
I always test them before release and they work fine for me, but apparently that's not always the case.