I dig it, but I would take a step further for Demonology locks. Maybe add in a section where they aren’t just glorified Imp Mothers and have some manner of demonic generation that creates more then just imps.
Sort of something like the DK’s Army of the dead, but with the menagerie glyph. Basically you summon both melee and Ranged demons of various types whenever you spend soul shards. Lower the damage ramp up time, and increase the sustainability of damage as a demo lock.