My concern is that I’ve never seen these skylights installed using (I assume, from the uniform color and appearance of the various flashing components) the factory flashing on anything but a single plane roof surface. Hopefully, the installers built a small curb angled on the bottom as required to meet the sheathing and providing a “flat” surface to which to mount the skylight, and didn’t just bridge the upper and lower roof surfaces with the skylight, with its body supported only at the top and bottom.
That said this appeared to be a careful and “workmanlike” job - not a hack - and it’s not currently leaking (I Tramexed the interior perimeter of the skylights), and assuming that they used step flashing designed for a higher curb in the middle, I don’t have an objective reason to even suspect it’s wrong.
So I doubt that I’ll mention in the report, and just content myself with having verbally informed the clients that ALL skylights are potential sources of leaks, and that if they observe any evidence of leakage, to get it investigated, stat.
Still, it bothers me. And I wish I could find a better way to express my (admittedly entirely theoretical) concerns - I just have the feeling that in a year or two I’m going to be getting a call about “those leaky skylights”.