I don't agree that FFXIV healers are boring. Everyone talks about 'perfect' play with perfect tanks and dps and there's nothing to do. I don't see this perfect gameplay hardly ever.
One thing we know from devs, is that Healers will never out damage the other roles. So, if they gave us 1-2-3 dps button combo plus 1 or 2 ogcd dmg buttons (doesn't really matter if any of this is tied to a gauge or not)... our damage would still be the same and now the job is just 'busier' to accomplish the same thing. And that's even if they gave us somethin resembling a rotation. What I could see them more likely doing is getting rid of all healer dots and giving two lower potency nukes that equal the same thing. There's your 'engagement' you get to press 3 buttons instead of 2.
Honestly, why is 12111111111112 less engaging than 123123123012123123120 or 122231222341223122234? You're just pressing buttons and not even looking at your hotbar either way.
Then, because we have a "dps rotation" somebody takes avoidable dmg and we have to interrupt our dps to heal thus ruining our dps even further. This is akin to the complaints GNB have regarding trying to move the boss during their burst window. Even when AST had decent cards, nobody wanted to play the "busy healer" WHM still had better representation back then not because it was better, but because it was easier. Even today, it is the most played healer next SGE despite most healers agreeing it has the most issues.