first off, UTC makes major errors. RawArt found it completely butchered his horror mandroid (flesh and circuits intermingled) and other really detailed textures. i think he posted pictures in the daz forums some time around when it came out.  in point of fact, my understanding was that it couldn't do 2nd skin or patterned textures at all.  what i remember of RawArt's posting was much worse than what you're showing here.  and the UTC plugin spoken about for Aiko here i'd  bet is V3 to Aiko, which would be cake since the only difference among unimesh figures is that they relaxed the UVs each time they made a new mesh.  the big leap was from v2 to unimesh, and that's where i've seen the nightmare distortion throughout the whole face and body (creepy is what it was).   and is the only shift equivalent to your work.

but!   i used it on many great textures and had it perform perfectly.  because i didn't use it on 2nd skins.  i wanted brown sugar and golden girls by daliniese for v3, and it worked great for that.  i was very happy with its performance as a purchase, but frankly was not happy when subsequent add-ons were basically for other unimesh figures.  i bought the base because i thought it was going to be a universal texture converter, not a unimesh/daz one.  and i didn't expect with a $30 base that non-unimesh add-ons would be so expensive.  i suspect that it was more complex than anticipated to go forward with, and i bear no ill-will towards dark whisper.  but to be totally honest, i would much prefer i pay for a single remapped figure that doesn't require extra work or hard drive space on my part.  and while i hadn't heard that the v4 UTC was officially announced, i'm not surprised that it'll be split into two products - one for the head and one for the body (from what you seem to be saying).   unless you're planning to charge upwards of $40 or $50, i'm betting this will be the less expensive option as well as more convenient (imho).

if you make the detail areas match up with the mesh (like where there should be creases or wrinkles in the skin texture, i'm fairly sure that will be enough for her to work great for my work at least.