I would like to pose that the FEN data be dynamic rather than simply showing only the FEN data for the latest state of the game.  That is, if the game has reached the 15th move with white to play and I click back historically to the 10th move in the game where it was black to play, the FEN should dynamically change based on the "move" that I have currently selected.  This would be very helpful for those of us who care to only analyze a specific historical move in our games, rather than the entire game.  It would also cut down on confusion.

Please let me know if how I stated this is not clear.

Thanks.

Yes, thank you for this suggestion. It is an interesting idea which will be considered for future addition.