I really like a lot of the new defence upgrades and structures. I.e. Making the humble TEC gauss platform nasty with extra cannon and rockets, and the hangers able to shoot down bombers etc.
I also like the face that there are a number of interesting options with the TEC starbase that allow it to function beyond it being a large weapons platform. i.e. repair, trade etc Means that these functions are being looked after by the station and alows you to focus on the more effective use of your limited tactical slots etc.
Margor
I think the starbases should have options that you cant get elsewere. Trade,repair,hangers are nice and no slots, but there has to be other exciting powers they could use. Auxilary govt is one fine example, we need different starbase only tricks. I also think bases ARE built way to fast,and there should not be one in every system. Thats why I beleive that bases be able to be deconstructed and built elsewhere.