I like it! I particularly like how you've used political changes to explain the Ambassador
's limited runs, and I think the "old school" thinking of Landau and company also helps explain why Excelsior
and her friends seem so favored.
I also quite enjoy the way you have the classification system being reorganized. Using the "shrink" of practical warp technology as the catalyst seems quite right.
One thing I questioned was Exploration Directive 902.3. I know this is from the TNG TM, but would you elaborate about the limit you mentioned? I don't recall hearing of it before.