I agree on what Cirrus said though. BUT the buffer is not that OP since only the Guild Master can summon his members there. In WoE, you wouldn't summon them there everytime they need a buff. It is faster to just have a buff slave character and buff them everytime they die, and if you summon them to the hideout, it will take precious time and others might be able to break already(like in geffen castle where the emp breaks almost every minute) If you are not the guild master, you cannot abuse it everytime you die or get dispelled in pvp. Dispell makes it useless, let us agree on that, but if it gives buffs that cannot be dispelled(EDP and FCP) then that just gives them an edge. Specific class buffs might make a difference on pvp, yes but EDP doesn't last that long anyway, and it is easy to get FCP without the buffer.
People might be thinking that "EDP AV is OP" or "EDP Asura" or "EDP Matyr" but as I a said, EDP doesn't last that long and it is too much of a hassle to buff everytime. EDP Asura can be countered by using ONE OL to be honest.. Matyr can be dispelled.. i don't know AV though :( If you hate them so much, gang them.. might not be your style but killing them ONCE will make the buffs go away anyway.