The default controls are bloody terrible. It's unfortunate the way they set it up. But I found a far better set up on the Champions Online forums, dubbed the "FPS style" control scheme. It allows for far smoother targeting and efficacy in combat.

Also, the "claustrophobic" thing - that might be related to how zoomed in the camera is. I zoom all the way out when playing. It gives a much wider field of view and feels much less cramped as a result.

As for the other complaints, not much I can really say to alleviate your specific concerns. I disagree re: missions - i don't think they're any more or less compelling than those in other games with quest-based leveling systems. And for the imbalanced powers, yeah - some are definitely stronger than others. It's only really a problem in pvp, but if you want to do really well in pvp, you gotta twink the hell out of your char. And thats' not far from true in most games.