I’m still on team end the EC. It really does cause states like California to have people shrug thinking their vote doesn’t matter. Moving to popular would end swing states period. Elections shouldn’t be decided by a couple states that may flip flop. Campaigns spend ridiculous money in only those places and ignore everywhere else.
One (of many) arguments against it: We were promised the costs of the indirection-layer of sober statesmen would provide a feature, protecting against a patently unqualified demagogue. The feature broke spectacularly.
That said, if I had a magic-genie wish between (A) popular vote for President and (B) replacing all our plurality-voting schemes with one of the many better systems, I would choose the latter.