I haven't really touched this subject, though I'd say there's a rather good reason for that. It's way I've played the game for a now, that is, I've only been running endgame raids and epics, so I've half forgotten there even is a another part to the game
And now that I'm doing TR's again, I don't really concern myself with the fact casters are overpowered, simply because the content I'm playing is just a grind for me to get to level 20 ASAP and I want to be done with it quick, and if caster can make it go quicker, cool.
That might sound a little hypocritical in the light of my previous arguments I guess, but that's because of the way I view most non-epic and non-raid content, I don't really care much for them, and when I run them, I just want to be done with them and be capped again. (Now this isn't always true, some quests are rather interesting, but it holds true when grinding for xp)