So I think what you are saying is that you did not use the AccuFeed ...... and what you are calling your Walking Foot is actually the AccuFeed foot. For clarity, I believe that you can buy a separate walking foot which is not an AccuFeed foot.
When I had my 6600 I loved the AccuFeeds and had the three I mentioned above and saw no reason for a separate walking foot. Actually I had four, as I had both the open toe and closed toe ones for regular stitching.
From what I understand one of the joys of the 8200 is that it is much easier to switch the feet than it was for the 6600s and some of the other features are fine tuned to make it even nicer to work with than the 6600. Here's to many happy sewing hours for you and your 8200.