Another problem is that I've seen it said before (concerning a Creatu idea that involved shamrock markings) that things like stars and other symbols aren't exactly something Res would do anymore. Yes, the Iluvu has hearts on its legs, but it came around a long time ago, when we were still doing simple things like green dogs and spike-spined bears.
Now that Res has gradually moved onto less simple and more realistic designs, symbols just don't really fit.