So...
Anyway, what is the goal of this thread? What problems is it focused on?
It sounds like the original complaint or concern is that zerks are a "realmshifter theme", and that instead, everybody uses them.
If Realms are better (numerically) at zerking than everyone else, that would be a shift toward realm away from others.
If Realm is given a straight zerk boost -- does it need it? It already endlesses and raids like a champ. The damage is certainly there. Zerks don't really effect pvp too much, nor towers due to their short duration.
If others are given a straight zerk malus -- do they need it? How much power can be shaved from the other classes in order to solidify realm's zerk identity? To make space for realm to be appreciably different.
Instead of power, should we talk about access to zerks? Right now we have some gear, consumables, skills on specs, and a follower. Should Realm have special zerk access, since he's thematically aligned with it?