It is not possible to create a non arbitrary system. You may attempt to create what appears to you to be a more parsimonious system, but know, at least, that in doing so you will change the fundamental power dynamic.
Thank God we need the consent of a supermajority of Congress and 3/4ths of the states to change the electoral college. It's not going to happen, just give it up.
Once enough states join the National Popular Vote compact to clear 270 electors, the electoral college will be nullified in practice. It may take a couple more decades, but it'll happen eventually.
Don't worry. The first time a Republican wins the popular vote, but Democrat carries the state, people will cry about their vote not being counted in THAT race, will drop out of the compact fast, and electors will probably defect no matter what the state does. NPV doesn't really solve the problem.
Thank God we need the consent of a supermajority of Congress and 3/4ths of the states to change the electoral college. It's not going to happen, just give it up.