The Facts.
Here are the facts:
Phil Mickelson has NOT been helped by his association with Butch Harmon. Harmon's "method" of widening and shortening backswings, and getting his players to make a steeper planed downswing has NOT had the effect it was supposed to. Phil won the Masters basically making a big backswing and ripping it. Stockton is a better putting teacher than Pelz, but Phil will always hit the odd short putt.
Tiger Woods was put "in a trick bag" with the Haney method. In my 28 years of teaching, fixing the mess left behind of all sorts of method teachers, including from when I was too reliant on a "pet pattern" in my youth, there is hardly anything as hard to fix, and have the player comfortable with in tournament play, then an over-rotated left arm flying wedge, and the laid-off top of the backswing. His putting stroke has gotten shorter and slightly more wristy. He supposedly got some help from Foley, but now the claims are that it never happened.
All the family issues that Tiger has isn't helping, but Phil's life isn't all beer and skittles either. Granted different issues, but still not easy on your golf game.
Plus, both men are having to deal with all the good young guys who are now starting to win, and will start to win majors.
Phil will play well at times, great at others, and horrid some too. He always has. No matter the teacher.
Tiger will figure out where to go for help, and after his other issues get sorted out, will stuff a few majors down all the naysayers throats.
Book it.