Liberal UK has some good ideas.
Based on my own observations (mainly from PF), I'd like to add...
1. I would also like to see the candidate's platform affect the starting percentages in states going into the general election, so that it's not entirely dependent upon the party affiliation, e.g. a Pro-Choice Republican should have slightly lower support in state like Kansas.
2. It doesn't appear that primary performance in state affects the starting percentage in the state. Primary popularity (to a very small extent) should carry over into the general election. This might make it more