I'd be very cautious about tinkering with the work of the Founding Fathers. The current arrangement has served us well for over 200 years. I'd be inclined to stick with what we've got.
Recall that, before 1994, the Democrats owned the House for over 40 years.
Not really a founding father or Constitutional issue. Nebraska and Maine split their EVs by district. It’s up to each state to determine how they assign their EVs.
It would be interesting to see someone analyze how many EVs Trump would get if they were all divvied up by district. It might be impossible to do as the votes seem to be counted and reported by counties, not by districts.
One about EVs vs. popular vote is that your state doesn’t get rewarded for having higher turnout. If only one guy showed up to vote in Florida vs. 100% of registered voters in Pennsylvania, FL still sends more EVs to the candidate.