none of the 9 rare +2 affixes actually match the classes, unlike the others
Augur, Butcher, Conqueror, Despoiler, Fanatic, Phantom, Runelord(cmn, that’s just cheeky 
), Spiritualist, Thaumaturge
Any chance for some “parity” so it fits the combos, similar like Sorc, Commando, dervish etc 36 existing prefixes
Disagree with this. The alternate names are honestly really cool and thematic. In fact, I wish we had more alternate names. Phantom sounds so cool as a class, come on!
Most likely, they added alternate names because Mystic is a prefix but now it’s a class too.
Please do not change this. Let us enjoy our role-playing in peace.
what do you propose we rename the other 36 affixes to then 
i dont’ care, i just want consistency 
(actually i do care, since it makes it way easier to parse an affix/build name )
that class isn’t in the game tho? that’s the gripe, what are you roleplaying as? “a prefix”?
By that notion you can roleplay as anything regardless if it’s there or not 
But it makes it more “confusing” to identify what 9/45 prefixes are meant for when it doesn’t match the rest of the trend, so at minimum the others should be renamed in the name of dis-parity and roleplay, or the new 9 should match
It’s just a fun alternate naming convention. Some of the current class names are not inspiring in my opinion. So having additional names helps me play differently. I don’t know what a “Veilwalker” is but Phantom is something I can build around. In fact, I’m doing so right now. Fanatic and Butcher are also pretty cool. Remember, this is a role-playing game. 
Anyway, there’s tons of prefixes, I do not understand how only these confuse you? Just learn the name? Or use grim tools? But leave the names alone please, they’re great for role-playing and world building.