Not sure I know what I'm talking about, but I'd look at a couple things:
1) Your right elbow is not staying out in front.
2) doesn't look like you're getting your weight forward dynamically. If you look at Tiger's right leg, you can see that his hips must be forward (and rotated more than yours). You look more vertical, and I can't see your left pocket.
Whether these are symptoms of a different problem, or a problem to address by themselves- that I cannot say.
For what it's worth, I do remember this video on my right elbow has helped me. In your backswing, the right elbow looks ok to me honestly, but it seems to get stuck behind you on the downswing to my eye. You likely don't feel that connectedness right now that people talk about.
All of this under a disclaimer: I'm a student like you. Just trying to give ideas until an expert chimes in.
If it's just a one-off set for Tiger, they won't worry about that. They can grind him a set that looks identical to his Nikes (if that's what he wants) and not have to pay them for the design.
When Fred Couples moved from TaylorMade to Bridgestone he had been playing the Taylor 300 irons, so for several years B-Stone built him "prototype" irons which were virtually the Taylor 300 with Bridgestone stampings.
You correct not much reported on his injury/illness, and when fellow golfer made the crack about withdrawing might just been right not a serious problem, but as you say we see what expires at the Honda this week. My thoughts still go he was not going to make the cut so he sort cut himself.