Nice progress.
Prototype 4's proportions seem stockier (particularly Cass-head) which has caused a bit of a dip in cuteness. Cuteness isn't really about sizes, it's about ratios, & the head to shoulder ratio is probably one of the most important.
Could it catch on? Probably!
Are you referring to the last two pictures? because I totally added gundam-esque shoulder-pads for those, but you raise a good point either way. With the cass head I also left off ears, which I think have helped combat the ratio problem.
the normal arms I think i'll go back and alter again so they perhaps come to a thinner point at the top. though I might keep these around in case I start trying to do male characters.
Other than that though I'm going to see what I can do with just adding more stuff rather than re-working the models. (worst case scenario I can just make the head bigger XD)
thanks much.!