I'll hop in here. Yes black is an accent to any color, so is grey, that doesn't mean we need to wear both those colors. I simply don't think the uniform needs it, it doesn't add anything of value to the uniform IMO. The contrast between the red and white is perfect, why take away from it?
As for a redesign I think it's simple. Use the helmet as your base, that's what everything else gets designed off of. What does that mean? Single white stripe on the red jersey, single red stripe on the white jersey. Same for the pants. Clean, simple, and uniform. Option to wear all white, all red, or the traditional. Also miss the contrasting belt from the early 80's. There used to be a great concept by one of the guys over at sportslogos.net that pulled this off perfectly. Can't find it now.
Beyond that? I think HIO's idea of inverting the helmet every now and then is great. I also wouldn't mind the interlocking "NU" and the iron N from time to time.
And it cracks me up how many people always come in here *cough*cough*Pops*cough*cough* and crap on the idea that some people have opinions on this and care about it. BTW, TA certainly does and says he will be looking at making the athletic department cohesive and on point in it's branding and uniforms.
Oh, and a HELL no on the grey facemasks.