With all the upcoming changes to missiles, it would be nice to get passive missiles and MFCs. This would give fleets another stealth option. At the moment, you have to either give your position away when you intend to launch or bring a fighter with an active sensor, Both things give away your intention minutes to hours before your missiles strike.
Additionally, I was thinking about alternative missile fuels. What we have right now is a regular liquid fuel engine only. What might be an interesting addition is solid and hybrid rocket motors. They do have a significantly worse fuel efficiency, aka Engine power hours per fuel mass, but they are easier to manufacture and store. In terms of Aurora that could be translated into a tradeoff between range & speed vs build cost and resource requirements for the engines. Hybrid motors would require less Gallicite and fuel and solids would require none at all, but they would burn maybe Tritanium.