SB has a treadmill from the beginning: designing, building and upgrading space ships and stations.
i think one of starbase's biggest strength is that no player has to be on a defined path to find progression and enjoyment in it. and another thing that i think plays in starbase's favor is, to see this game at its fullest, you will have to accept the fact that it is going to take many players working together to create their own world around them to play in. and that will make people want to fight and play harder because they have so much more invested into that world that is around them. thats just my opinion.