I think you all have some good comments for and against the starbase. I have mixed feeling about it myself.
What I like: It gives the fleet a "kin house" which could be used for roleplaying or just hanging out and having fun. It provides opportunity for extra DOFF assignments. It provides opportunity to purchase premium gear and ships. (I don't run STFs.)
What I don't like: It can distract members from playing the game. It can drain resouces that could be better used somewhere else, especially the Vanity projects. I'm okay with doing a few vanity projects if they make it more fun for the membership, but don't see a need to do every one that comes up. What's the ROI??? Some fleets are basing fleet rank solely on contributions to the starbase, other contributions or service to the fleet are thrown out the window.
Just my two credits...