Bacon's idea for the Molly base makes more sense. Think about it, right now the Mollies really can't spare people to hit the Corsairs. Sure they would like to but they can't spare the men to attack Omega-5 since they are busy trying to get their independence again. Lisburn seems somewhat impossible. It has BAF on one side keeping reinforcements from coming to Lisburn and an overwhelming Corsair force on the other.
Lisburn would make perfect sense if the Treaty of Dublin was still around but for now I think that either Bacon's idea for the Molly base, or no Molly base at all, would be best. I liked having Lisburn to dock at but right now I just don't think it makes sense.
As for the Corsair base, I'm all for it. Bretonia is the main pirating ground for the Corsairs (that and Omegas) and they already have the presence in the ice cloud to make a base.