Why would Gary Payton come in as as assistant coach (of the team)?
If we want his defensive skills to be imparted to our guards, then why not hire him as a consultant, call it "Guard Coach" just like "Big Men Coach" is a common position.
I don't see him of any use for the forwards and centers on the team, and I wouldn't want him anywhere in a coaching capacity of the team in general - I don't believe he nearly has the analytical/observational frame of mind to properly coach teams, and players unlike himself.
I don't see the whole point of hiring ex-players (who were great in their position) as coaches of a TEAM.
Mitch Richmond probably never drew up a NBA play in his career - why would we want him as a coach?
Just because a guy is an elite athlete doesn't mean he knows jack squat about teaching other people, about analyzing opponents and coming up with multi-player strategies to combat them, etc.
Especially players who got by on raw athleticism. Their experiences in the NBA are actually counter-productive IMO for teaching someone else to play like they did - most people can't.
Ex-players like Jason Kidd, Avery Johnson, Mark Jackson, even Steve Kerr - I can understand those guys, because they made careers of being floor generals, who were integral to the offense and picking apart opponents.
But Gary Payton (and Mitch Richmond) simply did what they were able to do out there. That was from physical ability.
It takes intellectual ability to coach a team - you can't go out on the court and do it yourself.
Another point -
neither of them has shown me anything from their speaking engagements - I am not impressed with their skills off the court.
To contrast - someone like Doug Christie is EXACTLY the kind of player (and person) who might make an excellent coach. His observational skill, his ability to get across his points well, and his astute/accurate reads on subjects suggest he would be good for coaching.
Also, his on-court career was made with study, and effort. He didn't blow anybody away with his physical skills - it was his brain that let him win on-court battles.
To sum up:
Don't hire coaches for their athletic abilities - hire them for their brains, and their personalities.
And IMO, Richmond and Payton are lacking in those 2 areas.