Quoting MayallCommunion, reply 6Well I believe the Vasari loyalist have Starbases that are able to phase jump correct? And their minelayers kind of fit the description.
Their Starbase can move around the gravity well, but not phase jump.
OP's suggestion doesn't really work with defensive structures. It would change the way the game is played for the worse.
Read what I said "Vasari Loyalist" the Vasari will be able to, I cannot remember if it was the rebels though and not the Loyalist.