Dunno. Certainly being free of the TIE shuttle's 4-point limit is good - Krennic is essentially a modification-in-a-crew-slot rather than 'normal' crew, but being able to put Hux on a ship which can equip Twin Ion Engines MkII, or Palpatine on a ship which can run away effectively is going to be good, and it's hard to overstate how useful an actual primary weapon that might hurt someone can be - more 'palp aces' games have been won by people forgetting the shuttle is actually fairly well armed than I care to think about.
Jam is a pretty good tool too - especially if facing missile-armed aces.
There's at least one use for the TIE shuttle which will go no-where - SnapTac Rhymer - because it's tied to a unique's pilot ability.
The TIE shuttle might also be a good call for a Death Trooper caddy. Whichever ship is carrying the black-armoured, vocoder-speaking goons is essentially a sort-of-biggs (shoot at me or get stress rained upon you!) and as such is earmarked for death as early as possible. A Lightweight Frame TIE shuttle is cheaper and tougher than a TIE reaper, which are the two key qualities for an expendable ship you want to fly into your opponents arcs of fire and survive as long as possible....
Edited by Magnus Grendel