I’ve been very pleased that expressions ported in from GenX do come in as dials.
I did manage to find the expression morphs for Genesis, which I never found for M4 and was stuck with having to use packaged expressions, which never were dials. And I do find dials much more flexible. Of course sometimes the dials come in weird. Like one set which I never can use more than about 70% because while the rest of the face is usable, the eye morphs always come in too strongly.
Screenshots of the work window, not renders. The one with the corner of the perspective box showing is 70% of the grin morph from Arcebus’s Alyson (no longer available). The other is the 100% morph of the Alice happy smile. Both are usable, I think. I didn’t try to combine them, but I possibly could (another nice thing about dials).

Click thumbnail to see full-size image