Hey Dey - you said you couldn't PK man, what are you doing this stuff for?? You're making the people who you kill feel bad (j/k man
:p )
Cheers,
L-A
Yeah, so when I say 75% of the people I killed, that means I killed one and a half people. 
As much as I like berserkers, the only thing that niggles me is that their "offensive capabilities" seem to lack. Mages and communers can really have the damage piled on them, I agree. But they also only have one/two defenses (excluding BMGs) and a well dressed Warrior can achieve the same with fourth attack and riposte.
As far as fighting melees go, trying to beat any sort of even half-decently dressed warrior or blademaster is ridiculous - for a class that sacrifices defensive abilities for extreme offensive power, I didn't really see anything much more on the offensive side. I'll try to find any logs if I can, but most fights I had with these two classes involved around 2-3 attacks hitting my per round, and me hitting them maybe once every other round. Raging is pointless against melees unless you use it as 'surprise damage' when the enemy is close to death as the boost to hit/dam just isn't enough to outweight the significant beatings you recieve as a result of raging. Sometimes I would try for a rage, and I'd still see a couple of rounds worth of my attacks blocked, with the odd attack landing every so often, just that bit harder. The only reason I won any fights that I did win against Warriors and Blademasters, that weren't poorly dressed, was because of Haymaker and then letting the WM skills do the damage. There was also the fight with Askarran, where the only damage I did all fight, was the scratches from dirt kick. 
Of course, these are only my personal experiences, and aren't exactly an accurate representation of the classes strength. Because one thing I didn't utilize enough is Weapon Cleave/Shield Cleave. But the reason being, that even with Weapon Cleave mastered, it just didn't work enough to make it worthwhile. Now I was told IG, by quite a few people, that it was down to my weapon choice. 100% in Weapon Cleave, 103% in polearm, and a heavy polearm - didn't work much, and I don't know the reasons why that is a bad cleave choice, STILL, after playing two pinned Zerks. Heavy axes worked, but realistically, double-grip an Axe against a Warrior or Blademaster, and fail one or two weapon cleaves, you're just asking to get pounded on hard.
It may sound as if I'm making Zerks out to be weak/underpowered, I'm not. I still think they could use a minor tweak, but they're certaintly not underpowered. If anything, I just couldn't utilize a Zerk to it's full potential. But to me, they are a LOT more EQ-dependant than any other class in the game, simply because you need to be pretty decked to have a good fighting chance against other melees (excluding Cabal choices).
Dey