The Imps already have a small support ship to counter the CR90. It is called swarms of TIEs. It is how the Imperial Navy doctrine dictates things be done. CR90 does not fit. Not a weapon that is properly fear inducing, nor capable of dealing with any common peasant uprising. Works great as a fast raider but that is not what the Imperial Navy is designed to do. Local police forces are supposed to handle those lesser duties where smaller ships are better suited.