I agree with number 1 completely. I think givin the fact that he will be surrounded by team doctors means he will be monitored daily and it would become part of his daily regiment.
As for number 2 I don’t think his play was ever erratic or inconsistent, just his behavior. This tells me he has the skills to play at a high level medicated or not.
He’s wasnt going out there winning on pure emotion or instinct. He has smarts , a good understanding of the game, and other skill sets so I think he would be just fine. It would be different if he had moments when he were stellar and others that were awesful but I don’t think he had that problem.
Either way his problem was behavior while a symptom of bipolar needed to be addressed with or without medication. While medicine may help in that regard he’s still going to have to change his behavior.

I didnt say anything about his play being erratic and or inconsistent. Because his high-highs will be knocked down the euphoric feeling of being 'in the zone' wont be the same.