I would never be so bold as to offer specific advice or instructions on Tigers swing or putting style. If he were to seek outside help, someone with a similar approach would be better than going to Mark Roe,. Steve Stricker actually has a different style; but Tiger respects him because they read greens the same, try for the same pace, and Steve has observed Tiger's best.
Tiger's methods seem more inline with Stan Utley teachings. Some of Tiger's drills are the same and his right hand dominance agrees. Heck, Stan could visit Tiger's home and nobody would know it probably.