That's a lot of hopefully and a lot of needs to get better. We are on the same page, then?
If Taylor were deadly with his scrambling and mobility inside and outside of the pocket, he could be pretty deadly, period. If we're going to have a running QB, let's get one with shake-and-bake and dynamic running ability, not one who will burn you if given a hole to burst through but is otherwise helpless.
I think ALL of Nebraska's players need to get better. I'm more optimistic than most about Taylor because I already think he's pretty darn good, and most of the improvement needed is mental, not physical. As opposed to a guy like Rex, who is mentally as sharp as you're going to get, but may be more limited physically than some other RBs. (For example, I tend to think that Martinez's lack of 80 yard runs this year has less to do with him not being as explosive, and more to do with defenses not being worried that Rex Burkhead is going to go 80 yards the other way, like Roy Helu could).
I see people constantly say, "Well, we should get a QB who can do this or this or this." If we could come up with some hybrid clone of Peyton Manning and Michael Vick, I think those people would be happy. But there's no such thing as the perfect dual-threat QB, and in college, you can't just hire whoever you want. Right now, we have Martinez and Carnes, neither of whom are perfect.
I guess instead of wishing we had someone else, I try to look at the positives we had from QB play (of which there are many), and I realize that QB play was far from the issue that caused us to lose games this year. Shoddy defense, special teams implosions, and lack of discipline where much bigger problems than QB play. In addition, the offensive line, wide receivers, defensive line, and secondary were all position groups that were more inconsistent and more accurately the reason for our struggles this year than QB play. Why aren't there 3 billion threads about those issues?