I certainly agree that photos and video can mislead. Always best to get out and see the top players in person to really get a feel for what they are doing.

As for now vs 2000 - 2000 - because that motion was IMO more on 'auto', vs now where Tiger is fighting his tempo as a 'swinger' and his clubface control is in his right hand thanks to a left hand grip that doesn't match the motion he is trying to make.

That said, his current motion is 'almost' better than 2000, and could be with a few minor adjustments. Much better plane now, but his left hand grip is the reason he is fighting the new swing, and his tempo/balance issues have less margin for error now than in 2000, when he was more of a hitter.

There is a different left hand grip for swingers vs. hitters? What is Tiger's current left hand grip and what should it be?

IMO - his left hand (mainly thumb position) is a 'bit' on the weak side, which along with getting off tempo, tends to contribute to the 'wide right' shot he hits at times. When his tempo is on, CF takes care of squaring up. Not a big change, but one that would allow both the left and right wedges to be in place without having to 'time' or 'do' something.

The grip is the foundation of a pattern. Ideally 10-2-B is the grip for both hitter and swinger, but there are advantages to the variations depending on the rest of the pattern.

Tiger's Pattern in TGM Terms
 

We haven't heard back on this one...describing Tiger's pattern.

Edz mentioned the grip. Learning the proper RFT, tracing the straight baseline plane line and stationary head Tiger would have a TGM non compensating swing. He is almost there now.