Great write up, OP. I am one of the people who believe the traditional trinity idea doesn't apply to this game, due to exactly your points on the roles, and who hopes that 4.0 will bring more utility to the damage dealer class, allowing them to expand on their role as more than just a damage dealer(like the old Bard LBs, 1 bar gave a damage boost to all party members, while 2,3 bars gave raid wide heals)