It's apparent that the current AI does not have special variables that indicate they are in armored vehicles when working as a squad. If you are the commander of a tank platoon and order your tank forward, the other tanks fail to keep proper pace in the formation. They will often speed past your tank, and then struggle to slow down and reform the line. When ordered in a relax state, they will attempt to wounder around as if they were infantry. This also prevents proper convoy movement as the AI tend to run into each other when sudden stops are needed.
To compare, playing Arma 2 with AO shows far more competence in armor maneuvers and obeying commands. They keep pace with your tank in slow and fast speeds, and will not wounder around if told to relax. They will also be far more reactive in stopping during convoy maneuvers. {F27287}