Rick wrote:
I am seeking opinions as to the performance of such an antenna

The opinion is it will be a great antenna.

The modeling facts a
It will give you approx. 11 dbi gain, and 13 db f/b. It will have a feedpoint
Z at resonance (7.025 MHz) of 33.3+j0.

The gain will vary from 11.24 dbi at 7 MHz to10.2 at 7.2
. . .

Try deleting the parasitic element and see what the gain of just the
driven element is. The difference between this and the Yagi gain is the
gain relative to a single element at the same height. This is a more
meaningful measure of gain than dBi for this application.

Roy Lewallen, W7EL