I think he would not be impressed but I might be surprised. From what little I've read on him he was one of the most grounded individuals in the business.
I handled one of the newer "larger" framed P365s recently, I'm tempted to replace the P320 with one. I tried the metal framed version and didn't like it. The neck is too small and digs in to the web of of my hand sharply. For my baby soft hands the polymer frames soak up a little of the recoil making it more comfortable to fire.