It's not a question of "fun", "mean", "exploiting", etc. The game and the classes are amazingly balanced. You guys just had a rude awakening of what some of the teams and classes out there are capable in the hands of people who set it up for use at full potential. Unless you can show me a fraps or a screenshot of something blatantly impossible everything you've posted here and elsewhere so far pretty much directs 100% to you not knowing much about WAR yet.
Okay. Sorry mate, but you are a moron.
That much burst, even if it takes excellent co-ordination to pull off, should not exist. By your logic, you can have a class that has 1hp, does 1-2 damage per hit but has a 100k damage aoe nuke once every hour and that's balanced.
This isn't a knowing x about the game yet. This is about creating an actually fun and appropriate gameplay experience. People will always defend their overpoweredness with the claims that it's all skill baby. Why the hell would you play any other class other than tank, healer, sorc/bw? If the ideal team is 5 of the first, 5 of the second and the rest of the third, you have an issue. If the other classes underperform, then they become unpopular, players never see the class their class is meant to counter, the game is deemed unfun and the company loses money.
It really doesn't matter how hard it is to pull off, a well played aoe caster team will eventually catch a bunch of people in a cone and waste them, because the game has you fight in small spaces and attack (typically) static objectives. Hell, even if they don't get it off, they prevent you from forming an effective group, forcing you to split up while the other team gets to run around smashing you with their superior grouped numbers. Oh and casters do great single target damage also. If the game comes down to which side has the most aoe casters, the game design is bad.