Illidan Trinket = imba?!

Illidan Stormrage, the last boss in The Black Temple, drops a very interesting trinket.

Nothing special you may think, although the "use" effect is very nice?
Well, the trinket doesnt share cooldown with other trinket(s), so you can use this 1 and e.g. a spell damage increasing one at the same time!
It also has a 2 min cooldown, like every other trinket.