If getting rep was less punishing somehow, I might not care as much. As it is, the character I raid on is the ONLY character I'm getting rep on, and only those reps I really need. I'm skipping August Celestials because I don't need any gear they have for me. I'm skipping whatever the hell teaches you to fly on the oversized long dragon mounts because I already have a ton of mounts and prefer the flying disk. (Frizbee mount was so good that I went and got it the first night I learned of it.)
So no, I don't expect rep to become account-wide. I just expect to ignore most of it. If it were account wide then I'd go ahead and bite the bullet and grind it all out once. Who knows, maybe I'll do that someday - on a human, on a PVE server.