I don't really like the click sequences for pvp either.

However, running two class types at once, makes it quite hard to effectively micro manage both classes actions in a competitive way. Even one click sequence on class A, as you micromanage class B might be an option.

Two class types gets more power and diversity, but it harder to play each optimally at once. I'm just saying, if you are playing more then one class at once, in arena (either 1 + 3, or 2 + 2) with a healer played by someone else as the 5th toon, you might need a click sequence to have a chance.