Sounds like what you're referring to, or might need, are projection morphs. The morphs that affect the clothing while leaving the shape of the character unchanged. I'm no expert, as I've just recently started tinkering with them. I'm so tired of the vacuum effect with clothing you get, thanks to auto fit. Here's a couple links I've bookmarked recently that might help a bit.
Creating Dialed Projection Morphs
How to fit DAZ Clothing using Marvelous Designer