They were saying on the news that this is the first time in about 50 years that the Presidential primary mattered in West Virginia. This does not seem very fair to West Virginia. Even for me, I feel it's useless to pay attention to all the early candidates, because half of them will be gone by the time the election gets to me. But at least some are left when the election gets to me.
I think it's good to have different primaries at different times so that candidates can visit different locations campaigning. But I would suggest that they divide the country into six or eight regions, and have a primary in a different region each week. Also, the order of the regions could rotate from election to election.