Regarding intimidation.
In a patch message a while back they stated that the reason intimidate wasn't working was because if any other skill was used (ie: kick, disarm, whathaveyou) while the intimidate skill was trying to go off it reset the skill and cause automatic failure.
I believe they said they fixed this problem. However, I don't see much use for the skill unless you happen to be a melee grouping with someone who's fear kiting and just want an extra chance to help fear the mob. Still doesn't work all that often I've found.
Regarding berserker skills/discs, we get a HECK of alot of tomes we have to buy and turn in. New axe summons every 5 levels and all. Also, focused will is one of the most useless skills I've seen yet. Heals something like 30hp over 1 min or something like that and gets turned off automatically if you attack or get attacked by anything.