I wouldn't recommend it. Even I don't know what that could do. It might be for the best that we get used to things without sliders.
I want to continue my SimLit story to a conclusion, but these updates are making visual changes that are too jarring for me. I might restart my story so that my characters can at least look consistent.
My biggest concern about this bug might be that even the Vanilla presets that don't come from any mods won't update outside of CAS.
I'm going to create a new save and double check if anything mod related could be involved, but it's more than just sliders. Child Sims have 3 preset body types and they are not updating in live mode either with CAS.Fulleditmode active.