Really wish they would've brought back playbook diagrams and gave your Myplayer the ability to add sets into the team offense when his team chemistry was high enough. Also "little touches" should've included one of the more pervasive aspects of NBA: the high-fives and exchanges between teammates on the way back down the court after a good possession. Its a little thing that, when absent, is really noticeable.
The how: Establish a fixed point at which the hand bone attachment moves to regardless of height for simplicity's sake. Whenever the criteria is met, teammates passing within proximity will reach out to that point at the same time.