One thing that occurs to me is that we're overestimating the importance of QE comms. What makes QE comm a killer app is the ability for warships to send real-time tactical and strategic data too and from Command. The Alliance and other Citadel military will pay us a handsome amount for that, no doubt, but it's hardly as necessary as we're prioritizing it.
Our problem isn't that we're communicating with far-flung, lightly equipped outriders; we're communicating from one secure point--our main labs in Landing--to other secure points--our manufacturing, and possibly laboratory, if that's allowed, facilities around the planet and across the galaxy. We don''t
need fancy QE Comms for that, we have old, reliable tech that is provably, mathematically secure: we fill one of our super-frigates with storage media and send a giant multi-yottabyte one-time pad to each of our remote installations, then we can just send comms via the plain-Jane extranet with no chance of being eavesdropped on. Don't underestimate the bandwidth of a cargo hold full of data.