I don't know I've been loving healing this expansion. There's a decent amount of CC but a lot of it is avoidable for most healers. Plus arenas are supposed to be about your team, so as long as your teammates are paying attention they can help you avoid CC too.
And the rest of the pace of the game feels really good as a healer, not 20 minute dampening games but you have time to actually use your abilities in an impactful way. Honestly feel like the game is in a really good spot atm.