You're essentially talking about that though, aren't you? I'm not as scientifically inclined as you are, so bear with me if you will, but you're really just talking about a weapon that goes through shields somehow, right? It jumps from point A to point B -- point B just happens to be inside a ship.
It would be helpful to mention
this thread. The tech you're talking about essentially can't be obtained by anyone but Yamatai, and any other FTL drives probably can't be tooled fast enough to make it really worthwhile. I'd also imagine the timing alone for this weapon to work, unless it's just launched and let go, is amazing complex.
The KIF weapons you're talking about ... I've never even seen them used. Wes, do we use stuff like that anymore?
Forgive the caps -- I wasn't yelling or trying to be demeaning with them. But the one-shot, countless kills types are being phased out and, for the most part, are phased out of current IC use. One-shot kills are limited to torpedoes now, where the energy weapons take multiple salvoes.
On top of this, we're talking about a weapon that would be so expensive to produce, it would be inefficient to even employ in battle. And who would use it to begin with, I wonder? Yamatai probably wouldn't, even though it has the tech.
This is the disadvantage to reading a shitload before you really start playing. You absorb too much without seeing how it's processed in the RP. That's not a knock to you doing your homework, which is incredibly well done by the way, but this is what happens.