I think they're an improvement. The old uniforms were way too monochrome or whatever; basically all steel blue. I like the green gloves/shoes, although I notice only Marshawn has the green shoes, the other dude has grey/blue, which is a bit boring. I'm not sure how I feel about the "feathers" on the pants and such. I like the idea of a highlight or what have you, but those only look like feathers if someone tells you they are supposed to be feathers. Not the greatest sign of good design. Also, I think the helmet needs a little more of the green besides just in the logo's eye.
Of course Nike was going to go super modern, but I wouldn't have minded something a little more classic.