Only suggestions I have is maybe an option to have the sync feature apply only to the currently selected shot?

Perhaps a script where when you highlight a model or group section of bone of a model in the animation set editor and you can use a script to tell it to only highlight the position or rotation of a bone. It would help save time opening up every individual bone just to select position or rotation.

Unless there's already a script or a feature of SFM out there that does this that I'm not aware of.

maybe like a mode for images if you just wanted to do an image reference overlayed instead of a video