You don't get to decide how others play in randoms, If your bitching (I know its the OP just saying in general) about someone's DPS in a MMO that doesn't allow addons while doing Castrum Meridianum of all place's then yes "You" are being elitist.
The content got cleared, Move on. If someone wants to go in and cast one ability that's their choice, As long as it isn't causing a problem (and in Duty content it won't) then its whatever. Want to tell people how to play go make your own group.
There is a reason that every time a thread like this is posted the vast majority are saying stfu about someone's dps. Figure it out and take the hint.