I think they should have primaries in all fifty states on the same day, rather than picking just a few. Especially when those few are all Yankee or Midwestern states.
New Hampshire and Iowa literally have it written into their state Constitutions that they will have the first primaries (the obvious paradox is resolved by New Hampshire having a Primary and Iowa technically having a caucus and so far no other state has put such a clause in their Constitutions so the waveform hasn't collapsed yet)