Yeah if the electoral college was removed voting patterns would be completely different. I don't think we will ever know what would happen, but I think it would be the opposite of what most seem to think. After a readjustment things like rural issues would become actually important. Votes in states like California would actually be up for grabs, while things that effect rural America would become mainstream as they would be 'pooled' across all states.Tbf in this example all those million of republican votes out of California count for nothing. If they could all be added to the total pool instead then it would actually be fairer.
Another point people miss is that the current politicians you see and how they campaign is modelled around an EC reality, while if that changed then you can also expect changes in who and how as it relates to the presidential election. Likely voting patterns would change too.