Nothing changed in 18 years for Hokkaido, because nothing changed in the system. All the old bases are still there, all the old patrols. How can you justify securing that system in the midst of a war with a major naval power? Mobile miners? That's laughable.
Then again, I suppose that's like Rheinland rebuilding it's entire navy in 18 years. Just happens that one is developer endorsed and the other isn't. I'm not sure where you got the contention that the KNF is the largest Navy after Liberty and Gallia though, I thought that was Rheinland. Both you and Bretonia have gone through many years of attrition, whereas the war between Liberty and Rheinland is much younger.
That said, if the rumours never changed, neither did the RP. Im not sure why you think it's okay to go against vanilla rumours.
From what I can see, there's a massive amount of ignorance in the KNF now. What's more, it seems to have absorbed all the people who wouldn't usually be considered as such. Shame that, but good job I got out before I became part of it. I'll just tick along with my hatchet.
Im going to quote your figure of 70% of the KNF being in the Tau's when/if 4.86 comes out. Which basically means, you're going to lose 70% of your navy. Have fun rebuilding everything in six months, which is probably what (you will say) will happen.