thank you for your gracious words, Nigel.
Yes, it's true; I'm not totally following the typical sonata pattern, but call it artistic license and that wonderful freedom we have as 21st century composers

. Maybe it'll make more sense when I finish the work....
(and actually, the original theme comes back in a double sense: after the climax at the end of the 3rd theme and followed by the piano introduction (although just a snippet). So it's kind of in a "chiastic" form, ABCDBA.
Legit criticism, though.
Thanks again,
Brooks