Mercenaries

Mercenaries should not have unchangeable skills. The game should allow you to socket skill gems and supports, not necessarily in the equipment that you provide for them, but based on your own choices. First of all, I dropped the whole mercenary companionship gig real quick, because they behave like they have epilepsy or demonic possession, all the time. Can't they just be somewhat like your other minions or even Einhar? They flood the screen with a chaotic mixture of aoe effects and they NEVER stop teleporting, from left to right and from down to up. I don't even know what's going on anymore, when they start to go into action. I'm better off alone, with peace and quiet and no extra lag. They also die fast when it counts the most and you can't revive them in the same area. Why's that? At Diablo they could've been revived indefinitely, as long as you pay the toll. The first time I hired one, I expected it to level-up with me, but my expectations are always too good to be true. Is it too hard to implement the experience and level gain system for mercs too?