(“unfortunately”) the names are already decided/revealed [Asterkarn] Berserker class name guesswork - #210 by Zantai
Soldier: Thane
Demolitionist: Dreadnaught
Occultist: Primalist
Nightblade: Reaver
Arcanist: Evoker
Shaman: Mystic
Inquisitor: Runekeeper
Necromancer: Veilwalker
Oathkeeper: Zealot
(you can also see them on grimtools now)