To specifically clarify a couple of points:

Quote Originally Posted by Fendred View Post
To balance that, it's "cure II" level ability was limited to 3 charges (lustrate).
Cure II was a straight 800 potency heal.
Adlo was 300 potency + 180% as a shield for a total of 840 potency.

If you crit, things get really spicy. A crit Cure II effectively equalled 1200 potency thanks to the 1.5x crit modifier.
For Adlo? You get a 450 potency heal + 810 shield potency, however the crit would also cause your shield to be doubled to 1620 potency for a total of 2070 potency combined.

Keep in mind, this is ontop of the considerable amount of healing from the fairy that could be focused onto a tank with manual embrace spam.

SCH was a monster at healing once you understood it.

Quote Originally Posted by Fendred View Post
If things went wrong, the tank would get eaten despite spamming adloq because of how the shield consumption vs cast time worked.
To confirm, this is exactly why you didn't spam back to back Adlos, you alternated between Physic and Adlo for the best effect. Assuming a worst case situation where you didn't see a single crit, the lost potency from each physic was easily offset by fairy embrace spam and lustrate. Also remember that SCH actually had more healing focused CDs than WHM thanks to the triple whammy of Fey illumination (Remember, Selene was a trap and sucked), Rouse and Sacred Soil.

Quote Originally Posted by Fendred View Post
The devs pretty much said they didn't like that approach, so they stripped it of DPS abilities and replaced them with more healing abilities to make the healing more "safe."
Do you mean the quote where Yoshida said that WHMs were carrying all the healing whilst SCH sat there DPSing? You realise he was instantly proven wrong there right? IMHO the real reason SCH got stripped was because it's damage was wildly out of control on Heavensward trash pulls.

I did video guides on how to do 1000 DPS as a SCH in Nevereeap pre Gordias gear in patch 3.0. If logs didn't have it's full premade requirement those demo runs would have landed me a top 100 DPS spot for the entire expansion. I was doing as much DPS in primal gear at 3.0 as some DPS jobs were doing by 3.5 in vastly better gear.

That was a bit of a problem