Alright, I'm fairly sure that nobody will disagree when I say that zerks have been getting the short stick for years now. Introduction of warrior lores, fired weapons, pugil and other random tone ups for the melees have left the zerks out. The zerks got staff (to avoid instant death to warriors/rangers/ninja) and path lores.
While path lores are interesting, two of them offer additional penalties (anger/devastation) along with their perk. This is nowhere near the increase other melees recieved.
So, these are my proposals...not as a group, but individually:
Allow rest/sleep during panic. Or at least allow relax to..relax panic along with rage..making it a useful skill. Zerks need to play the attrition game too, or they will be dominated by it (as they have been).
Weapondam bonus (similar to ogre). Zerks SHOULD hit harder than any other class, and a lot of times they don't. Warriors get more attacks and unblockable (fired weapons), (not to mention rangers) making their damage potential way higher than even rage allows..without the penalties of rage.
Edge/throw/doublesheath skills. Allow zerks to make throwing axes and auto-toss them during murder or flee. Can also be used for unblockable damage in combat via throw. Might even consider them adding some substance to it (such as paralyze/poison).
Rage grants good mental saves. This will solidify their role as 'mage' killers, while making sense with their clouded mind.
Roar causes auto-flee into random direction. This allows the zerk a chance to survive if things go wrong while raged, but isn't that useful against PCs since it has a 2 round lag and they can attack again. Put a timer on it so it can only be used once every few ticks.
Haymaker + headbutt openers. As explained before, this gives them an offensive edge.
Headbutt may cause thunderclap directional sense. Also showcasing zerks ability to confuse casters/communers enough to maybe kill them.
Give zerks +moves at levelup. This shows the hardiness of zerks and gives them a little perk over the other melees.
Rage grants +1 size due to bulging muscles, etc. This bonus obviously can't be used when not raged, so nobody will have a suprise super laglock.
Almost forgot: Weapon cleave: Be able to cleave off-hand weapons!!!
Edit: I mean comeon! Even monks got another toning before zerks!