Sorry sojournstar, I assumed most people were familiar with the expression working in “post” which I believe came from the film industry and refers to working or fixing things in post production… or after the cameras stop rolling. Basically what you’re doing in photoshop with your Epic generated characters is indeed working in post (only in this case after you’ve already compiled your character with the Epic generator).
I too would love to see the Epic generator capable of handling body/arm/head variations at the click of a button, an maybe one day we might. But the enormous number of variations that would ensue if such a thing were applied to the already considerable body of work the Epic generator is capable of, makes the prospect of it prohibitively large. So my suggestion for the meantime is to make greater variability possible through simply providing such body/arm/head/facial expressions available as separate files for folk like you or me to work with in post.