While I'm not against addressing speed as a general gameplay mechanic, intentionally making the AI worse than it already is sounds awful and the approach you are suggesting isn't "balanced".
Getting blitzed by better modded teams can suck. Making the AI go extra dumb, but only in situations that benefit slower teams, is not a good solution though. If you are going to make AI changes, you have to make them across the board. If tanks cant taunt on round 1, ALL tanks cant taunt on round 1 and then you have a different problem. Keep that in mind when you are trying to think of a solution, you cant selectively change things, you have to make consistent changes down the line.
