I'm in agreement that the new unis just really couldn't change much, because our uni's are so uncluttered and clean now. Teams like UF and Boise or LSU have always had additional stripes on their uniforms, so they could make little alterations and it might improve them. To me, the LSU uni change last year looked pretty classy, but the helmet was the biggest, most notable difference.
What I envision is a more slipstream cut to the material, which might give it a different appearance, with no changes really to numbers, other than maybe a slight, slight different script on the names and numbers. No stripes, no funny collars or colors. The helmet....I have no idea what they might do, other than a unique facemask style, or a change to the glossiness of the paint. Perhaps teh white stripe on the helmet doesn't go all the way down the back, or perhaps fades into an elephant tusk-style graphic.
Seeing some slight hint at houndstooth wouldn't hurt my feelings.
It won't be dramatic folks. It'll be tasteful. UA wouldn't have just blindly agreed to a change.