Good work. If you have this level of detail for ships you "despise", I'd like to see you try out a ship you actually like.
And I'm one in favor of Starfleet having built ships in batches over the years with relatively minor exterior modifications. There's plenty of precedent in real life; the ten Nimitz-class carriers were launched from 1972 to 2006, over the course of 34 years; the Gerald Ford class carriers that will replace them will be built over an even longer period of time. The first Arleigh Burke class destroyer hit the water in 1991 and the class is still being built in the US (with variants built in Japan and South Korea). And the F-4 Phantom was built from 1958 to 1981, with examples of the plane still flying in air forces around the world.
Plenty of reason to believe that Miranda class starships were built in several batches (or "flights" in US Navy parlance) as the need arose. they would be outwardly similar in appearance but the innards could be significantly upgraded with each batch, and to older ships of the class if need be. The aircraft carriers Intrepid and Midway are two examples of old ships that were rebuilt several times over their service life despite having the same basic shapes (angled flight decks nonwithstanding). So, the Brittain could have a relatively modern bridge despite being a module plugged into a hull that was 40+ years old.
In any case, it's still a great summary of the models' usage over the years. Hope you do tackle the Excelsior class at some point. Maybe you hate it, but it's one of my all-time faves mostly BECAUSE it's been seen so much.
I agree. I also think that Starfleet would have the advantage of longer lasting technology (I think Dukhat
has a valid complaint about the models being reused so often for budget reasons, but we don't know how long an "average" lifespan for a design may be in Trek's era) and that it's cheaper in resources to modify an existing design to build a new one from scratch, even with resources like replicators.
I've found where there are several sources in potential conflict over a design (like FASA having two separate variants of the Oberth model, with different names since that designation didn't exist), there are ways to make things fit together seamlessly or mostly fit. FASA first refers to the Grissom as being a Gagarin class, after the cosmonaut, and then mentions an improved Sagan subclass to represent TNG's era (Tsiolkovsky started in this class). The Oberth can be a third refit/variant and the Tsiolkovsky could have been refitted to it in keeping with the canon information.
Same thing with the Avenger/Miranda class issue. Since the Miranda designation wasn't added until TNG, one could assume it refers to older ships that have been modified or refitted and which started out as Avenger types. FASA's Reliant class cruiser variant, based off its own Anton class science cruisers, is a bit trickier (Ships of the Star Fleet had the Miranda/Avengers being descendants of Coventry/Surya TOS frigates), but one could argue Starfleet was working on both at the same time and the Reliant/Anton refit was intended as more of a general ship and not necessarily for tactical duties, where the frigates would have an emphasis.