A very minor issue that is nonetheless worth mentioning:
Elohim Devouts can upgrade to Priests of Leaves, Confessors, and Stonewardens. This has been true for a very long time. However, when the Empyrean religion was introduced, they were not given the ability to upgrade to Vicars. This has actually directly impacted my tactics when playing the Elohim ever since I had a truly epic game where the Sheaim were sending hordes and hordes of pyre zombies at me, and Priests of Leaves upgraded from all my spare Devouts I'd been using for scouting duty with Life II casting Destroy Undead was literally all that kept me in the game.
It would be perfectly in line with pre-existing flavor to let Devouts become Vicars, or even let them also upgrade to Cultists and Ritualists for those who want to try playing a darker version of the Elohim.
Not a big deal I know, and certainly not high priority or anything, but should be a very easy fix to make.