Funny thing:
DPS are dependant on everything.
Healers are dependant on everything.
Tanks are only dependant on DPS checks, which are only a thing in savage content. Heal-checks are a joke especially for WAR, stack mechanics can be solo´d. Instakill mechanics because "You´ve the wrong role" actually show that SE just tries to force us to play nothing but a standard-comp instead of fixing their classes. Not to mention that 95% of all content can be solod by tanks, meanwhile DPS sucks hard for their 33% more damage and healers can only do that out of hardhitting tankbusters with 100 times more efford and time investment.