hmmm.  but would the new figure have face room support?  one of the reasons i like eF figures is that i find the face room rather useful for just creating head morphs. 

if you're basically just going to make a new figure out of her.... i'd say just run with it.  i mean, i have no preference about the direction to take her face or body.  i'd rather have a rounder figure based on jessi than a thin one (i have glamorous jessi), but really i'd say just go with your inspiration.  i will say this: i don't think i have that many clothes for jessi.  if you wanted to redo her grouping and joints along with changing her mesh, i don't think it would be a big difference.

that said, i'd be a lot more interested in a remapped jessi than a new figure with v3 mapping that at best can wear jessi's clothes.    but it sounds like that's too difficult.  ah well.