Here it is! The new #OneDnD UA Playtesting Materials!
We've got the Cleric with one subclass: life domain. We've also got revision to Ardlings, Dragonborn and Goliath.
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Clerics are in the "Priests" class group with paladins and druids. The level progression follows the same pattern as expert classes did: ASIs are replaced with the opportunity to take feats (one of which is an ASI, so not that different in actuality).
The last feat/ASI comes at level 19, and an epic boon is now taken at level 20.