At this point in his career, does it really matter?
I mean, who would truly want to hitch their wagon to a guy who's had 3 major back surgeries and hasn't played but maybe 3 complete rounds over the last 2-3 seasons?
There's nothing there to gain, and everything to lose imo.
Tiger will either figure it out on his own or won't. Hell - half the time he was with Hank Haney - Haney admits that Tiger was basically operating on his own and disregarded most of his instruction. (Read Hank's book if you don't believe me).
This really isn't news, but more of the same.
Tiger had one great coach (Harmon) who elevated his game to a competitive level on the pro tour. Since then - Tiger has basically been on his own.