Aggro is not a problem in this game, it's not about the DPS being "spoiled" it's about you being lazy. Doesn't matter if you're a WAR or PLD as long as the DPS aren't COMPLETE idiots and choose to attack completely different targets aggro is NOT a problem.

Put 1-2 marks up, if people can't follow thos they are idiots (at least explain it ones if they don't).
If they do follow the marks and you lose aggro, it's YOUR fault.

People seem to forget that WoW didn't only make it "easier" for the casual player, it also made it ALOT harder for the hardcore player. Which is why the WoW community over the past 10 years have had some extreme theorycrafting going on. I'd say the average WoW player is a better MMO player than the Average "non-WoW" MMO player (if that makes any sense).