New characters (created after the patch) now need to unlock each and every trait individually, all (currently) 75 of them. You need to complete dungeon story modes, 100% area exploration, jumping puzzles, champs and story line steps among others.
Also included in the thread, the cost of simply buying the traits:
The picture shows that cost of traits in a SINGLE attribute line: meaning to unlock all the Guardian's Radiance traits, you need to pay 8,6g and 72 skill points. Thus, to unlock a class by buying all traits you currently need to pay 360 skill points and 43g.