I checked out your products over at rpgnow, cool stuff!
For the 50% that you say didn't care for your Supers!Plus illustration, I highly encourage them to look at your work on the books at rpgnow. From what I saw they're much cleaner/better proportioned than your work on Supers! Not a knock on the Supers! illustrations by any means, I think they fit the book well.
Anywho, glad to see you on the (growing?) Supers! board.