I'll go comment-by-comment:
Is this why Tiger's hands may have moved lower at address?
Is this why Tiger's keeping his right heel down longer?
Is this because, as Michael Finney pointed out elsewhere on this forum, in trying to return the shaft at impact on the same angle as at address, as per Haney's preference, one tends to lag the sweetspot? And in lagging the sweetspot, is this why Tiger's trying to get his hands low and under the shaft (logically aided by staying on the right side longer)? That is to say, ARE THESE THE PROBLEMS OF SOMEONE TRYING TO BE A PURE SWINGER (given Tiger's excessive arm rotation) WHO IS TRYING TO RETURN THE SHAFT AT AN ANGLE AT IMPACT TO THE SAME ANGLE THAT IT WAS SET AT DURING ADDRESS!?!?!?
Funny thing about your last comment... that's exactly what they pointed out in the "swing vision" on Sunday. They said the "triangle" was returning to the ball the same as it was at setup. I'm not sure if that's really what he's working on or not, it could just be theory. Those guys love to point out some odd thing or another and contribute someone's good swing to that.
Anyway, moving on...
Lower hands at address, yes I believe so. You'd have to get inside Tigers head to know for sure... he sure won't answer that question honestly in front of reporters.
Right heel down longer, yes. And also because a lot of people believe this improves balance which has always been a source of inconsistency for Tiger. I am not sure of exactly the connection (as to WHY he's doing it) but I believe he's really trying to keep the heel down and set up with his hands lower at address so that he can avoid his dreaded "stuck" position. It's very common to see instructors telling juniors who have a problem getting stuck to keep the right heel down longer. It's all connected with this "drop into the slot" notion. It works sometimes, but tends to be very restrictive and erratic IMO. But hey, a guy just won a major with it so who am I to say?
I'm not really sure about that whole paragraph at the last part of your post. I'm not familiar with the discussion your mentioning with Mike. In the face of that I'll just stand by my original statement. I think he's trying to swing more upright, hands closer, and right foot down longer in order to get his hands under the shaft. Something Tiger has fought all his life. This is just yet another "band-aid" that someone perscribed to fix it. Tiger has sufficient talent to make band-aids work though.