I am a US student who lives in CA. My classes start soon, and Monday, Tuesday, Wednesday, Thursday I have classes starting from 7:15 PST, which will interfere with all the upcoming codeforces rounds, which are all scheduled during that time. Therefore, I won't be able to make very many codeforces rounds (and no--I don't have the godly potential to sit in a lecture and do a contest).
But more importantly, there are countless other users I suppose who also have events planned that consistently interfere with Codeforces contests. It is important, therefore, that the codeforces contest times are varied, not just 7:30 PST — 9:30 PST.
I hope I see some change. I would be interested to hear other users' opinions as well.