Tiger's flying left elbow in the follow through is really ugly. It looks like he is holding off a hook in that swing. Maybe he was trying for a fade? I personally liked Tiger's swing a lot right after he came back from his knee injury. I think he had trained that violent knee-snapping move out of the downswing and it helped his sequencing at first. An example of that swing can be seen at golf.com:
Tiger Woods Swing Sequence - 8 - Photos - Golf.com
I think he somehow ruined Hank's swing ideas with over-application of Hank's plane philosophy by flattening it TOO much after this point. Tiger's closed-hip squat and lower back arching in transition is unique and dynamic but it killed him when he overcooked those moves.
The Foley swing is probably too rotary for Tiger's tendencies and he may have trouble with it for some time to come. It seems like Tiger's version of the swing looks the closest to what Foley tries to teach compared to Mahan's version of the swing. Or to put it another way, Tiger's swing is more of a ground up rebuild and less of a simple incorporation of the Foley ideas compared to Mahan. His brain is probably dying to perform a down-the-line release as opposed to what he is trying to do now
I very much disagree with this analysis. I think that, prior to 2009, Tiger was very rotary with his swing his entire career. He had some of the fastest hip rotation in the game, resulting in his knee snap. Haney destroyed this release that won 14 majors by getting him to swing more down his line in 2009. Yes, Haney did reduce stress on Tiger's knee. However, in the process, he destroyed Tiger's rapid hip rotation that made him the most dominant golfer the game has ever seen.
We've seen that Foley is working to get Tiger to swing more left after impact. Hopefully he's working to get the hips to rotate more as well.
In the link below, Ralph Perez at Gotham Golf has some great observations about Tiger's left knee:
Gotham Golf Blog: Tiger Woods, the knee and his swing evolution
Two of the best things Perez says are:
"He use to play to win, left nothing in the bag and focused on scoring. His attitude was, "F...K the knee, I'm winning this tournament and we'll worry about the knee later". Not a bad approach if your goal is to be the greatest ever."
And:
"[Dean] Smith will go down in history as the only man that ever stopped Michael Jordan. The analogy here is that trying to restrict Tiger's lower body motion would be the equivalent of what Smith did to Jordan."