I still see Homeplate as a ...
..structural basin. The way that the scarp of the outcrop on the east side curves to the west as it traces north supports this idea.
Very low dips to the bedding that all seem to point into the center of Homeplate. If a basin, it is asymmetrical, the east side dips appear to be steeper than the west side.
A speculative cross-section I posted a few months back:
