Actually i dont find RDM aoes lackluster at all. Dualcast scatter looks powerful, can be cast from far away where it is safe to be, doesn't deplete your mana at all, you have some other skills on short cds (manafication, enhanced moulinet, fleche) to break the monotony, in fact it is the job i choose if i know i will be aoeing a lot.

But now that i think of it, maybe my opinion is a bit biased because the aoes of the only other 70 job i am actively playing, the MCH, are way, way worse XD