As far Imperial ideaology goes, hyperspacing ships in is often reinforcing a attack or garrison. In gameplay terms this is hard to do without breaking the game as reinforcements would seem to be A)Going outside a matchss agreed upon point value. or B) Going beyond the games 6 turn limit. In the Devastater and Death Star arrival example often sited in this thread that maybe X(100+) amount of extra points arriving in turn seven.
As for trying to find something within game contraints. I feel as suddently hyperspacing something in is agianst Imperial belief in overt displays of force and resource allocation. Either you bring your ship to battle or you hold back for the next one.