I disagree, since you said, “We need to hold our primaries, in most states, at the same time.” I think that the primaries and caucuses should be evenly spread throughout Feb., Mar., Apr., & May, with 12 or 13 states voting, each month. If that happens, the nomination process will be more suspenseful and exciting, with several candidates winning states and receiving publicity.
That is what just happened, we spread out the primaries and McCain was our winner. It was decided long before we got to vote in February. How can spreading this out make a difference? All we need are the Dems crossing over again.