Very nice fleet. Love the design and even thought the ships are Shells, the minimal interior you have in place is very well designed. And every single ship designed incredibly well for their specific role!
The only little downside I can think of is the complete lack of escape pods, especially the bigger crafts of the fleet. Although maybe that is considered "interior" as these ships have minimal interior as stated earlier, so adding them yourself shouldn't be a big problem.
So all and all incredible job from an incredibly talented Masterbuilder, DeepspaceMechanic!