FINAL FANTASY XIV Special Talk Session (translated)!!!

[Zumi]

you know why you have to follow a rotation? because you've got no time to think about your next move. that's a spamfest just because you have to line your skills in a fancy order doesn't make it any less true.

Wrong.

The rotation is mathed out by theorycrafters who figure out the best order to use abilities to maximize your dps. If you don't use your abilities in the optimum order then you will lose out on dps and are not playing to your full potential. Almost every mmo has people who figure out mathmatically what is the best order to use your abilities in.

You also have to pay attention to things like self buffs that you have to put on your self, debuffs you put on the mob, like combo points you may accumulate. You also have to pay attention to the environment, does the boss put fire or some other hazard on the ground does the boss do a clonal aoe that I need to avoid, does the boss cause part of the room to explode, do I need to use a self defensive cool down to survive high aoe damage the boss does.

[Felis]

Wrong.

The rotation is mathed out by theorycrafters who figure out the best order to use abilities to maximize your dps.

You forgot to mention: "use up all TP, steal hate x times from the tank and kicked out the party"