Should I keep staying with Dragoon or swap to another melee?

[Dervy]

Really, but I remember over the months since 2.0 from various forums and dragoons in dungeons saying that dragoon was the most complicated of the jobs to play. If I treat it like a priority system, similar to Smn, it becomes simpler while still being competitive?

It is a priority system. Think about how the job plays out. You maintain Heavy Thrust at all times. Juggle your DoTs, then throw in Full Thrust Combo as a filler. That's the definition of a Priority. That's all there is to the Dragoon.