A lot of the current generation of ships in play are actually, as of my next post or two, in a rather unique spot. Unlike the first generation ships, they still do have some use, but they are indeed being relegated to JP defense. Also, unlike the program in place now, the new program is directly based on the old designs, instead of something new.
I hope to have the next post up sometime next week. I've been distracted by writing an original space story (that borrows some of the physics from Aurora, as well as taking ship design inspiration from it). Plus... well, not to give away too much, but the NPR I found is a doozey... and when your "show of military force" gets blown out of the void... tends to cause rage quits...