Specifically for Augvoker, the “Molten Embers” talent only increases the damage enemies take by up to 20%, unless “Font of Magic” is also taken. The damage scaling per rank is also “counterintuitive” (10%, 13%, 20%, and again, 40%, but only if Font of Magic is also talented). I haven’t seen the completed trees for Midnight, but hopefully any changes that might decouple Font of Magic and “Scorching Embers” in the Devastation tree, won’t result in similar “insufficient” descriptions.
Also, as far as “insufficient” descriptions are concerned, Source of Magic/Potent Mana in the class tree aren’t able to be used on yourself, even if you’re in Preservation spec. This seems to differ from the Shaman class tree in that Shamans are able to benefit from their own version of their equivalent talent, “Mana Spring.” Ideally Source of Magic/Potent Mana for Presvokers specifically will be updated so that they aren’t “dead” talents in M+, especially since Midnight is adding 3 more talent points in the class tree, and really, I don’t see anything else that is actually worth taking.