My first thought was that it was dumb to use so much overlap in the tribes (beautiful people being brainy, brainy people being brawny, etc.), but I think it'll actually help. The big fear for me with this format is that it would give too much power to the beauty tribe because - let's be honest here - no one is going to say, "We have to get rid of X because he/she is too pretty." With three tribes, brains vs. brawn is the likely split, so it would just be a contest to see who pulled in beauty at the merge. However, with a lot of overlap in personality traits, it might not end up mattering because even some of the beauty people seem like potential threats (as opposed to what I pictured, which was six Angie Laytons who've never seen Survivor and have no clue how to play). This should help the brains, who I think would be 100% screwed without the trait overlap.
Also, giddy up: