I think the t-shirts make a big difference. I I saw a kid at the IHPO wearing a two piece singlet, so essentially compression shorts and a tight fitting shirt. I thought it looked great. The shirts are way less revealing than the singlets. Both are tight fitting, and I always just thought of the tiny sleeves on the t-shirts, and thought it wouldn't make that big of a difference, but it really did. The area you really notice it at is the chest, underarms, and back. Most singlets have a 5X7 or so cut out on the chest, back, and arms? That ends up being a lot of extra material. You really see it when a guy in a singlet is wrestling a guy in shorts/ tight tee.
I think that the new uniforms will be a big time positive for the sport. They don't take away anything, and imo add a lot of positives. From a marketing stand point the new singlets will be a huge improvement. I would love to be able to support my favorite wrestlers and college teams by wearing their singlet shirt around.
Besides the fact that people like them, and that singlets are somewhat traditional is there any rational reason why they are better than the new uniform?