Caervek while your statement carries some weight, it doesn't change the fact that Hunters are the only class (rare off-specs aside) that use 2h melee weapons in PvE primarily.  Now, if a guild HAS this Blood Frenzy Warrior, and wants to gear them, as previously said, there are many other options available.  If they are absolutely insistant on chosing a weapon that benefits Hunters greatly, then they should feel free to roll against them.

However, this whole "Warriors should get preference" thing is pure nonsense.  Yes, Hunters use their 2h weapon for stats almost entirely, however those stats account for a great deal.  In most cases, it's the weapon's stats, not the raw DPS, that you're after, whether you're a Warrior, Hunter or otherwise.  Between our melee weapon(s) and our ranged weapon, we get, by far, the majority of our stats from the melee weapon(s).  So how many classes do we have to pass to?  1h weapons to Rogues/Fury Warriors/Enhance Shamans and now all 2h weapons to 2h Warriors?  I'm curious as to where Hunters are supposed to get this big chunk of stats we'd be missing (I'm guessing the scraps left over?).  While the gain for this specific type of Warrior may be slightly higher than the Hunter's gain, to demand some sort of preference purely on that basis is wrong. 

Besides all that, my argument isn't even that Hunters should get preference here; I'm saying it should be a roll off.  That is, provided the Warrior will use it for PvE.  Rolling on PvP gear in raids is unacceptable, in my opinion.