Proportional allocation keeps the letter of the EC by letting states choose how to allocate electors in a way they feel best represents the will of their state, and avoids a Constitutional amendment. The fact that proportional allocation would be closer to direct voting should reduce the discrepancy between popular vote and electoral vote, while still keeping the principle of all states having a say in electing the president.  Although if it makes people feel their voices are heard just a bit more, the change in turnout might astonish the major political parties in how the popular vote changes as well.