It's impossible to say what the vote count would have been had the rules been different. There are a lot of potential trump voters in very populous states that likely stayed at home.
Here's alternative way to think about this. If you consider the fact that a lot of states are oppressive to their people(minority suppression, anti-choice, anti-environment, etc.) you see that people who can't live under those rules move elsewhere. Often to larger states/cities. The problem with this is that it only sways the electoral college more in the direction of the oppressors. Non-oppressive states get bigger, more inclusive and more open. Oppressive states push a single minded, and often single party, mentality. This essentially locks the power of the electoral college into the hands of the more oppressive states.
In reality it's the opposite that seems to be happening, red states becoming more metropolitan and turning blue. But what we saw with Trump was him winning traditionally blue states. Were those traditionally blue states being oppressive and sending their minorities to California?