Overall I think your design here makes a ton of sense. I think two pipe structures is a cool idea but I see why you don't want to do that. It was thought-provoking to wonder how the existence of ships like Saladin and Ptolemy could affect the locations of rooms locations of rooms on the ship. It is noteworthy how you have researched the 1701, refit, 1701A and Excelsior variants to learn more about each, and I was extending that thinking to other ships.
And another classic Constitution Class appears on screen. USS New Jersey, NCC-1975. Thanks Picard. And the 1701-A as well. A nice lineup of museum ships.