That could probably divide the community, I know more mmorpg where people can kick you out of the raid or dungeon for not having the addon they want we to use.
I think that people should not be forced to have addons, and it would be easier if there are no addons.
Happiness does not consist in realizing our ideals, but in idealizing what we do.
I do not see them wrong in case the boss is a challenge this will be a very important tool to achieve the goal of killing the boss.