Cant say I like the idea of taunting, since monsters ATM will not move to attack another unit if someone is melee'ing it you can always control "aggro".. that said if they change that system I will still have mixed feelings about this, since it would ruin one side's tactical capabilities... Might as well have a stun in most cases .
Also the suggestion about taunting seems like a flawed mechanic, what if several taunts the same unit? his accuracy would hit bottom while the taunters might have a few dodge remaining to make them impossible to hit.
Also ATM I don't like bringing units to a combat that is supposed to die due to the current Experience system... Think that system is my biggest grudge in this game ATM, experience and leveling.