So all classes should be good at everything? That my friend, equals DPS. I'd rather have three or four class types that a trinity allows than just one. Guild Wars 2 zerg everything that moves is a classic example of that. Hated it.
No, he's saying it's limited.
Why can't you have fast light classes that can move around the tanks and take out the healers and other soft targets?
Why can't you have generalists who can tank somewhat well, heal some what well, move around somewhat well, and deal good DPS?
Why can't you have assassins who use stealth at high risk to themselves to take out healer, and even tanks in the blink of an eye?
Why can't you have a support class that's good for keeping assassins and other classes from working around your team and taking out your healers and other criticle players?
Why can't you have an AoE class that tries to push apart your team, so that assassins have openings to slip in and strike?
Why don't monsters use these same abilities on players, forcing them to think
much harder then just "Tank draw aggro"?