Heavy turbulence might be exciting, though.

The complications with flying a twin engine during a single engine failure have more to do with flight characteristics than structural.

Ie, does the rudder have enough authority to stop a spin or does the engine provide enough thrust to maintain level flight.

I would expect the forces go both ways. The fuselages have their own forces on the wings and since they are essentially sub-planes I’d imagine the forces could both strong and un coordinated - eg one trying to go one way while the other tries to go the other way. I’m sure under normal circumstances, computers keep everything aligned, but wondering about stressful situations.