alot of people just dont want the responsibility of keeping groups alive and would just rather be that guy in the back attacking stuff. as dps all you have to do is stay out of stuff and pew pew and look at big numbers. I tanked for the last 10 or so years and had dps alts. With this game Im heals with dps alts. Needed a change.
Agree with the responsibility issue added on to that not as tense and is more fun/engaging in general to play.