How much sense would it make for the GTVA to produce and deploy Iceni-class vessels in the years after Capella?
Obviously, it's been done before in mods -- Derelict, most notably. And there are good reasons, both in- and out-of-universe, to do it. For one, it's a cool and under-utilized ship, and it fits very neatly into the FS2-Terran aesthetic in such a way that it feels almost strange to leave it out. From the GTVA perspective, it's a very powerful anti-capital tool that's more compact than a destroyer, and does a nice job of filling that particular niche.
But on the other hand... Well, the only one that ever existed was the very recognizable flagship of Aken Bosch. From the perspective of the GTVA, Bosch was a treasonous revolutionary followed by a band of violent fanatics, who promoted a dangerous and bigoted ideology, and whose reckless and arguably malevolent dealings with the Shivans nearly brought about the end of galactic civilization. And the Iceni was his symbol.
If you're the GTVA, do you really want to spread that symbol around? Take it into your fleets?
On the other hand, can you afford not to?
One other thing to consider is the design's previously-noted visual similarities to the Deimos and Hecate. It seems plausible that the Iceni was in fact a GTVA design, and Bosch just hijacked the prototype. (Command did seem to figure out what it was really quickly when the Boadicea disintegrated.) It makes sense -- while the NTF control a lot of territory and military hardware, they're not well-supplied with modern equipment, and it seems a little dubious that Bosch's people could design and build not only a new class of warship, but a completely new variety (frigate/pocket destroyer). We are told that the Iceni seems to be built around ETAK, but we can handwave this aside easily enough: maybe these are largely internal modifications.
If this is the case, then the GTVA deploying the class makes more sense: adopting a symbolic enemy design might be politically dangerous, but simply failing to abandon your own design after the enemy co-opts it is safer territory (and whether it's safer or not, is more likely to be recommended by status-quo bias).
As for me, I think the Iceni is cool and I want to use it in GTVA fleets, but the plausibility of it bothers me. What are your thoughts, HLP?