My company had an issue with a broken 737 flight spoiler actuator (or something caused 1 to stay stuck out). The brain trust got together afterwards to talk about how to handle the situation in the future. About half said, "Why not just use aileron trim?" and more than half said "No, just use rudder trim. You don't use aileron."
I would think the same would go for flap asymmetry, which every 737 pilot has trained for.
Would it make more sense to offset a flap issue or spoiler issue with some aileron trim or rudder trim?
It seems like aileron trim would relieve any force in the yoke, but it'd be canted at whatever angle needed to fly straight. Alternately, the rudder could be used and it would center the yoke. . . right?