Yes! And I second the recommendation to watch Rife above. I took his build, tweaked a couple of talents, then ran 17s and 18s with my guild last week. At no point did missed timers feel like it was due to a problem with healing. Some of the bosses got a bit spicy for mana, but I think that was me overhealing early on. Still need to learn the build better.
As for tyrannical this week… as yet, I’ve only been able to pug. We very nearly 3-manned Ner’zul on +16 after one dps “disconnected” right as the timer expired, and another died shortly after pull. We had him to about 7% when unfortunately I got trapped by the wall. With hindsight, maybe I could have set a teleport point and got through it? Maybe my defensives were up and I could have torpedoed through and survived the big dot? It is possible I had the tools to handle that absurd scenario but failed to make use of them under the heavy pressure.
Lower pugs have gone ok. There’s no shortage of output, and as long as I restrain myself on mana usage, there’s enough. It’s also quite nice to be able to stand back this week and stay out of sanguine while being able to fire CJL at explosives. This was something I often did on similar weeks in Shadowlands, and I was a long time proponent of building for the affixes rather than deciding that only fistweaving was good.
That all said… speccing caster doesn’t excuse failing to use empty GCDs to kick mobs. There will be times where you have 5-10 seconds of not needing to do anything which is plenty to go spinny kick on the edges of the action. Don’t take risks for it, but do what you can 
Although one to beware of; rising sun and spinny kicks burn more mana than maintenance healing with soothing mist + jade statue + unison, and of course means you aren’t doing that maintenance. It’s easy to get into a trap of being over-keen to dps, letting the group drop, then spending big mana to fix them quickly, when you could have just had that 2.5x soothing channel going for no cost. It seems to be a fine line of identifying when you’re legit doing “nothing” vs when you’re channelling for good reason.
My personal strat on this is to tell the group up front that I am running a max hps build and will rely on them to find the big duck dps. It consistently gets positive responses. Pugs want to be told their healer is specced to fix mistakes and doesn’t need them to play perfectly
I honestly think this is it. People are used to the Shadowlands meta where healers weren’t working very hard so everyone wanted the highest dps healer. That’s a lot less true in Dragonflight, most healers are having to work overtime to keep groups up.
And the thing is, me working flat out as fistweaver might contribute like 4% of the group’s overall. This shouldn’t be considered a big loss and is probably the last thing a healer should be optimising unless they’re seriously pushing keys with aspirations.
It’s much easier for the mage, rogue and hunter to play 4% better than it is for you, the mistweaver, to drop a chunk of your hps potential, lose the ability to target maintenance healing, tie your burst damage response to your celestial, and contribute that same dps.
Also, I don’t think we should be particularly surprised that our max hps build is NOT our max dps build. That feels like an actual meaningful choice!
I just kind of wish that other healers were given the same choice, because evokers seem to roll out good dps with any opportunity, regardless of how they specced 