I was thinking, why not merge CMC and shipping lines into a fully fledged corporation feature, that would have civilian ships, CMC, garrisons on CMC. And perhaps with the judicious use of a checkbox for 'more' would even be allowed to have limited military assets that they would use (rarely) to raid another corporation only? Unless you want to eradicate them because they just attacked a corporation you see as more vital, so you would have to police them a bit and they would be allowed to retaliate.
The first pass would be to have shipping lines build and pay for the installation of CMCs, and these CMC in return would provide income, so not a that large change, except the 2 civilian entities are now regrouped into one.
The second one is probably not something everybody will want, but that would give a nice alternate setting where it's not just me against big badass aliens, but me against corporations in the home system that do nasty things against each other. Kinda like very simple NPRs with focused role and abstracted logistic on many aspects (if they can have a few FACs, you can skip the whole 'have shipyards', 'develop techs', etc.).