I think the roll issue is exaggerated,
What's maximum AOB that most airline SOPs allow - 30 degrees?
How far out from the centreline is the farthest seat?
Are they going to be cranking the thing `round the sky like a fast jet - not likely.
More likely than not - these aircraft will be flying benign routings and joining on long finals.
I wonder how much more efficient they could make it by getting rid of the tails and integrating the engines into the airframe?