I am happy to see the pics
What are your concerns?
It "looks" good cosmetically now.
"For you" I am thinking any work to the trim pieces, and you are not going to like the way it "looks" even though they make the roof better.
Normally we mortar in the ridges of our roof.
But the weight of all that sits on top of the roof.
But with these mansard "Walls" i would be concerned with the weight of the concrete that they would be stuffing under all that.
Not saying that it will but
It would seem to me that the weight of the mortar could possibly pull these tiles off in the future and/or the mortar itself.
Very interesting roof and thread.
I'd like to know whats above that tile roof too..