I would say that this game is not so much about skill spamming as it is about positioning and moderation.

In most other MMOs, you can get away with spamming your strongest skills without worrying about the tank losing hate. If the tank does lose hate, it is purely the tank's fault.
In this game, the DDs and the healers are just as responsible for keeping hate down as the tank is responsible for keeping the hate up. That means slowing down your nukes and watching your DPS. It also means using various skills to either transfer hate to the tank or reduce hate to oneself.