Some thoughts on AA batteries / multiple weapons systems
I really like the Titan and Corvette having several weapon systems, one of which is AA. Capital ships and star bases would benefit from having some AA capacity. Larger units having no AA always seemed a little silly to me. I do understand that there are VS attack craft abilities. Large ships / star bases having AA batteries just feels right.
Cruisers would also be a suitable unit to have light AA ability and a few points of missiles. Cruisers having only forward firing "big guns" also seemed less than the unit could be. Obviously these changes would reduce the values of other weapons systems slightly for balance. My ideal armament for a cruiser would be similar in mixture to the current corvette: secondary weapons / AA firing 360, some missiles again firing 360, and a main battery firing forward. This would also make cruisers more of a utility ship which is the cruiser's historic role.
This being said I do acknowledge the role and reason for dedicated AA and long range units and would make these armament changes small.