I just did this video review which might be of interest:
Reading through your comments after the fact, I think we concur on a lot of points. The Dragonfly 15 is the closest thing to a holy grail, do-everything solo tripper that I've found to date and it checks all of my paddling boxes.
A couple of points not in the video:
1) Running with a tripping load (200 lb paddler + 75 lb gear), she loses some nimbleness but gains even more stability and predictability. Very confidence-inspiring when playing with ferries, eddy turns, and surfing while loaded or unloaded. The secondary stability has already saved me a couple of times when I was caught off guard and was sure I was going for a swim. Extremely dry in waves and the additional depth opens up the possibility of aggressive leans to make tight moves.
2) The expedition kevlar layup feels more than robust enough for normal river use, up to and including bouncing off unseen rocks in a rapid. I would just be careful to avoid abusive situations like pins, wraps, or very high energy impacts. Other than that, I have no qualms about using the layup as it is intended - and already have plenty of scratches to show for it. I'm just a bit more careful about abrasion without a gelcoat bottom, but it should be easy enough to refinish the hull with epoxy if it ever gets to that point.