There will be some changes to berserk coming in the next few days:

1) You will be able to berserk while stunned. It will shake you out of the stun. Also, when it pulses, if you are stunned, you will unstun.

2) The removal of hit points at the end of the berserk has been eliminated. This 'feature' will very likely return in a higher level bersek (but dying from using your ability seemed a bit much for a 5th level ability).

3) The rage of the berserk will end rather quickly once there are no creatures in the room.

4) A full powered berserk brings some 'additional' bonuses (which I'll let you explore a bit more).

5) The maximum hit point gain while berserking was increased.

6) The maximum berserk length has been decreased.

7) All other factors being equal, the Barbarian with lower discipline will berserk longer and with more power.

GM Damissak