Foxworthy said:
Basically the retraining rules are using xp to fix whatever poor design choices were made in the past. I'm pretty sure it's not open content so I can't get really specific.
But if a character reaches the seventh level of the barbarian he loses the feat but won't get any feats to replace them. It's the cost of the powerful abilities that the barbarians get.
So, what you're saying is, if a PC wants to "retrain" he needs to discard
x amount of xp first? Hhmmm. Intriguing.

Thanks.