Raptor couldn't do the Canberra job for 2 reasons:
1. The datalink is utter crud
2. If a GR4 altimeter ever hits 47,000ft the aircraft actually travels back in time to the 50's , leaving only 2 flaming tyre marks in the sky.
But isn't ASTOR fitted with the same Common Data Link as RAPTOR? You don't hear too many people saying ASTOR's DL isn't up to much?