No, no and NO! It's not like an offspec it's an entire class, you wnat it, create another character. That's how it works. It's similiar to what lineage 2 offered all those years ago, for example you started as a mage ( or magi, cannot remmember) then at some lvl you were given a chocie of becoming a necromancer, summoner, sorceror, or cleric.
The same system is impelemented here, deal with it.