Despite Antoine’s flaws as a player, I actually always thought he would make a good coach.
He has a great understanding of the game (again, despite the way he played it), good court vision, good passing skills. These are skills I always felt translated well to coaching.
Now his flaws: lack of restraint, tendency to try to do things himself, over confidence in his own abilities, etc., I don’t think carry over to coaching, so I wouldn’t be as concerned about these flaws in Coach Antoine.
Another guy, who never made the most of his ability, that I think would make a good coach is Sheed. Just like Antoine, has a ton of flaws, but a great understanding of the game (one story I heard, was when Larry Brown was coaching the Pistons, he had every player run plays from every position. Sheed was the only player who actually knew how to run the plays at every position).
They also both played under multiple Hall of Fame coaches (Antoine: Pitino, Don Nelson, Pat Riley. Sheed: Dean Smith, Larry Brown), had success at all levels (NCAA championships and Final Fours, NBA championships, All-Star appearances), and have played multiple roles from superstar to starter to role player to end of bench player.
Not that those things would automatically make them great coaches, but I think the foundation and potential is there, again despite their flaws as players.
So ya, I actually think both Antoine and Rasheed would make good coaches. Not that I would just hand them NBA head coaching gigs, but with a couple years as an assistant or in college, I think they could be ready to shine on the big stage.