I don't think I like the rage points mechanic. As much as having the barbarian do something new and different is desirable in a new edition of the game, I like barbarian the way it is. Some of the rage powers are kinda cool, but the costs seem somewhat arbitrary (3 pts for +1/2 level to AC, but 6pts for darkvision for a round?).
If you want to keep rage powers, I would recommend putting Rages/day back the way it was, and allow the use of a number of rage powers/rage equal to the barbarian's constitution modifier. That is the houserule I will be using, if I use Pathfinder barbarian at all.
Thats a good idea on the rages powers/rage. Sacrificing multiple rounds of being an effective combatant for a weak one shot ability isn't a good decision, and the costs are completely arbitrary.
On the other hand, x/day, particularly at low-levels, just sucks. If your signature ability is only available to you for 1/4 or even half the fights you're in each day, something is seriously wrong with the class.