Provoke is working as intented. "Taunting" is very... dumb and doesn't teach aggro management. Not trying to be rude, but Managing your combos are important to maintaining high threat.

But the fault does not lie in just the tank, Medica spamming is retarded. People don't know how tank emnity works, and thus they spam. As for BLM, people need to relax and let the tank get a couple hits. They need to learn that the combo is x2 emnity, x3 emnity, x5 emnity repeat. They don't know that your first hit doesn't actually generate much emnity.

Provoke turning into a taunt will not fix lack of knowledge, plus it would break many fights in Coil that require proper swapping using smart tanks.