The thing I've noticed the most in UF healing is the need to use Divine Arbitration and Epic at the right moments.

I haven't been using PR at all in the expansion, I have stuck to my general raid strategy, no HoT, Devout Remedy (to try and get GoM to proc) and then Devout Light. If tank is dying too fast then of course I skip remedy and go right to Light. Burst of Life has been a great little addition, instant is always nice for that "Uh oh" moment.

Focused Celestial Regeneration is pretty much the only HoT I use in UF.

I know my post is a little late but would like to read if you have any new updates on your experience in the expansion.