I actually understand people wanting more from there Mii creator...but I don't want more realism...I want more surrealism. I want more options for creating great cartoon caricatures. I loved how people were being creative and making movie monsters, actors, actresses and more all in a silly way. To me...more facial options and perhaps a very, very simple clothing editor would be great. I don't mean being able to go style crazy...just a couple of simple options like a basic dress, suit, pants, or shorts, cap, cape...ect, ect.
In the end, keep Miis what they are...and perhaps allow us to do more creative stuff. My last idea for this is allowing drag and drop features first...then simple edits. I would love to be able to easily put 2 sets of eyes on people...or more. Or be able to choose any color for skin and such. Let me go crazy...but keep that Mii style.