Psion
Adventurer
Jürgen Hubert said:So could feats. Or inherent racial bonuses. Or prestige classes. All are possible mechanics already supported in the Core Rules.
Which would be a fair point if it acheived everything that substitution levels do. Feats add; they do not take away.
Your resistance to the notion strikes me as odd coming from someone who has, as I recall, expressed a liking for GURPS.
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