Since the focus is so tedious to maintain with the Panasonic Anamorphic Adapter, does this mean that it is advisable NOT to use the DVX 100 and the Anamorphic Adapter with such mobile support rigs as dollies, jibs, and steadicams?

I'm not sure on the final answer to your question, but it is one the primary reasons I bailed.

Though my guess is usually, not always, you are full wide on the steadicam and focus seemed okay on the anamorphic, but monitoring that is a little tricky unless you have HQ 16:9 monitor on board.