Part of the reason I do have an issue is that I'm not assuming that each missile can resolve it's own targetting, at least not without it's own onboard sensor package.
Instead my presumption is that since the host fire control is providing terminal guidence then there should be a limit to how many platforms any one FC can guide. Even with this presumption I've got additional issues. If the host FC is providing terminal guidence then lightspeed lag should start to degrade accuracy at range.
For there to be onboard guidence it really should be a component that is researched and generationally upgradable. I know that it's been discussed previously, but I'm not finding it with a basic search.
What I'd like to eventually see is a means, with advanced technology, to have varying types of guidance packages. Various types of capabilities should be achievable. Guidence hand off, ballistic launch with sensors off and then activate at a preset wayppoint, programable targetting, stand-off for sensor only platforms (ie recon drones), etc etc etc.
Current fire controls can only paint a single target. Channels could allow for limited multiple targetting as well as multiple salvo/missile control.
I'll grant that there is a strong arguement that all fire control system is doing is target painting with the missile platform actually handling the guidence. That arguement being that the chance to hit is solely calculated based on missile component construction modified by verious target parameters. If that is really the vision of the current missile guidence then perhaps a new type of fire control and missile component could be introduced to give the ship the abilities I've roughly outlined.