I guess I just want to say that I empathize with you...one of my Ts is going through some crap right now, too (although I do believe he is fit to practice, it just kinda reminded me of your post). And although I know he is taking care of himself and he has friends and family to help him as well, it's hard not to want to help take of him, too.
It sounds like your T is aware that he needs to make sure he takes care of himself first so he can take care of his clients as well. I hope you are able to work out some sense of what is to come with him in the future and that you won't need to decrease your sessions or switch Ts, even temporarily.