Well, the Electoral College applies only to the offices of the President and VP. The suppression measures under discussion apply to *all* elections, all levels, and there's strong argument that all the other levels are far more important in the long run.
The electoral college system has its flaws, and I'm not in principle against replacing it with something else. However, the way we collectively form political opinions these days sometimes makes me wonder if the Founding Fathers were correct, that we need some protection against certain forms of whim of the electorate.