I think the AI needs a bit of work on moving through a slipstream (around starbase) unless I understand the mechanics wrong.
When you have slipstream up for a starbase passing anywhere in it's zone of control gives you that benefit, while ships with the AI pathing them seem to skirt the outside of the ZOC. This in many most cases is longer.
If it only works along the outside, or they get a bigger benefit from the outside it would be nice to be explained, as setting up slipstream routes would look greatly different.