I'd argue that making the support class is intrensic to the games core values, even in the RTS there were various support units and they made the game extremely interesting when used properly.
I have high hopes that this will open the door to playable bards(a buffer class), spellbreakers(a debuffer class), and other types.
Cut the que system down from 1 tank/1 healer/3 DPS to 1 tank/1 healer/ 2 DPS/ 1 support.
It's ore interesting as a whole, we don't need this game to be a dense once brain cell speed run of all content.
Not everything needs to be a selfish play style of "I must top the meters on dmg/healing hurr durrr" mongo shit.
Add depth, add range of play, add some more fun and interesting playstyles.
Gladiator warrior was incredible, shockadin paladin was fun AF as a support damage dealer and the reason why both were deemed "not viable" was because of people using some variation meters to dictate how the game should or should not be played. Remember enhance tank and ranged tank warlocks? Now take those and apply the concepts to new classes/specs. It could be entirely interesting and fun for the game to actually have some variety and not just be focused on pretending an MMO is some eSports it absolutely isn't.
Stop letting spreadsheets dictate what's fun, viable, and the games play style.