Strange this is, not a lot of great stars make good coaches or coach at all. There are exceptions (Mollitor comes to mind), but generally they seem to be average to run of the mill ex ball players.I think JB would make a good batting coach
Maybe it is because those average to below average guys had to "learn" the game and work/communicate with a lot of people to even have a chance to make it in the game. Another point is that to be a coach you need to start at the bottom and work your way up. Sometimes the "stars" cannot accept that role and do not have the patience or right attitude to learn how to manage, communicate and lead. They have more often than not been the best of their peers and have not had to work their way up like colleagues who did not have that natural talent.