Then the controversy in this thread is not about Toshiro's submission proper, but about the subject it helped make come to the surface: the capacity for star fortress' and other yamataian base-structures to show such mobility, with implied slipperiness and ability to withdraw from trouble, which makes them storywise much weaker elements in my opinion.
I don't like it, but arguing further on this thread for anything else but the merit of the performance of the submission based on existing and established setting elements would be unfair to the author. While I do believe it's tantamount to building on a weak foundation, Toshiro is only building up from setting precedents and fleshing it out - any argument against that precedent and if it should be reconsidered should be aired elsewhere. Therefore, I withdraw my previous objections.
What I would like to point out for the merit of this submission is comparison. My previous plotship, following established hyperspace ground rules, took 1 min+ (depending on distance) to make a fold jump and perhaps shorter if it was an emergency fold jump. It's maximum speed was 0.4 ly/m.
So, in effect, this system pushes the 'fast response' aspect wished for the 7th fleet to a point where a star fortress can be more mobile than a ship. Is that really a desirable trait?
Finally, I'm okay with 7th fleet exclusivity. This would basically mean that Kage Yaichiro personally tweaked, maintained and optimized the fold system of the 7th's star forts. I think, in that light, that it's cool to reward character action and involvement this way (I wish I actually would've seen more of it with my techs on Miharu). I think, though, I would've rather seen it as a acknowledged modification that carried bonuses which would be listed on the Star Forts individually (in the same vein as the Aeon and Eucharis being tweaked and customizable on their wiki pages).
So, my proposal, if everyone is cool with the charge time and speed... would be to give Toshiro precisely what he wants - but as a modification to the wiki of the Star Fortresses involved, and not an actual new piece of technology added to the setting. It makes Yaichiro look cool, gives Andrew what he wants, but explains away why the rest of the starfortresses could be like this: they wouldn't have Yaichiro personally tending to them.