Walton was a very heady basketball player and it was like having a second PG on the floor the year he was in the second unit with Livingston and the Grizzlies players (they did screw up the tank though).
He was hired to be developmental coach with the Lakers, but they signed LBJ, and that was all she wrote.
Now, if you're trying to build around guys like Fox or Sexton, he's a bad hire. They're not slowing the game down and running ball movement sets. They're off to the races and high PNR players.
So yeah, you need a PG like Garland, and (hopefully) a guy like Mobley who can serve as a secondary facilitator from the elbow. But even the best defenses struggle with teams that move both bodies and the ball well.