Grey Area
Remember my prior notes on high lift devices were about leading edge devices, not trailing edge. The Starship variable sweep canard was useful in trimming the extension of wing trailing edge flaps It wouldn't be of much use in compensating for the lack of wing or canard leading edge devices on a .8M cruise canard airliner.
As to the application of a variable sweep canard on an airliner, my fear is that when I go on to my just reward, Satan will assign me the integration of variable sweep canard, the flight deck, an electronics bay and the first class cabin. Every time a solution is reached, he'll remind me it needs to fold to make sure it isn't hit by the jetway at the gate.