It's really interesting and I like the design A LOT! Particularly that secondary hull. Talk about flying in the face of canon, especially for a post-ENT starship! I don't think it's really suited to Trek though. I like the Matt Jefferies design philosophy for TOS a of mostly smooth outer hull with all the maintenance done in crawl ways within the ship. For me, your design definitely works as a pathfinder study of the Daedalus or an alternate Trek timeline where FTL travel was developed much earlier.
You can disregard my 2 cents now.
