RDM burst is being pretty over-stated.
The underlying cause for aggro pulls and seemingly 'huge burst' - is that RDM has little to no 'Ramp-up time' - They start DPSing, and immediately they are in a normal rotation. The dps doesn't get higher at 5 mins into a fight than it is at 20seconds into a fight. Conversely it doesn't get lower either. So all those lull's in fight mechanics don't really hurt them that much.

This has 2 adverse side effects. 1.) RDM IS a 'bursty' class, but it seems like its doing more damage than it is. For all that burst, they are not miles ahead of other casters. 2.) There's very little room for growth in rotation perfection and increasing dps at a certain point. The gap between a great RDM and an average one is pretty small. - Knowing fight mechanics perfectly and gearing up is going to have far less of an impact on a RDM than say... a NiN, which for all purposes, RDM should be the caster equivalent to a Ninja. Cept NiN are overperforming atm too