[MegaTrain]

This has already been mentioned in another thread, but they have made a change that partially accomplishes what you want: Sats and Weapons platforms now get the range bonuses for larger weapons mounts just like bases.

This means that a satellite group even on the FAR side of the planet still can mount a considerable defense with some larger weapons mounts. Of course that means that you'll have to research larger satellites to get those mounts, but its better than nothing, and was probably considerably easy to program than the change you would like to have.