Well, Jeff, you certainly hit a nerve here.
The subject has come up before, and probably will again. Without going into an overly long screed and boring the membership, I would like to add some thoughts. I do so from the point of view of a full-time restorer/conservator, dealer, appraiser, and collector who occaisionally gets to make a piece of furniture from scratch.
The fundamental concept at work here is whether or not you believe a piece of furniture is a work of art. If you do, then the concerns about preserving originality are relevant. If you do not, they are nothing more than self-serving nonsense.
In the context of The Antiques Roadshow, the people discussing antique furniture must resort to generalizations. They have little air time and a large popular audience. I agree with their decision to hammer home the point of "Do not do anything." as the best possible generalization under the circumstances.
Those of us who work with antique furniture and its owners know that each piece, like each person, is unique. As the previous posts indicate, there are a number of different considerations when working on a piece and there are the inevitable compromises among those considerations in order to satisfy the wishes of an owner.
To return to the individual case at hand: Your Chester County tall chest. This is a piece I noticed as soon as you included it in the background of another post, and we have communicated about it before. I like the chest a lot. I notice that you elected to restore it as a chest on frame. Based solely on the information I have to work with, I would probably have restored it as a tall chest, with feet. (I can't come to your shop and look at the bottom because I live 3000 miles away, otherwise I would.) What is important is not the restoration itself, but the fact that it had to be done. Whether it originally had feet or a frame, whatever it was is now gone. That loss trumps all other considerations in terms of monetary value. At this point, the important thing is that a sympathetic restoration be done (no worries there) in order that the owner (you) has an attractive and useful piece of antique furniture. PSP