Il Grigio,
First off, welcome to the forum
Not one wing higher, but instead a roll motion caused by the motor's torque -- the faster the motor spins, the faster the plane will roll, and the more aileron/rudder control you will need to use to counter the roll.
Thrust angle (motor angle off of perpendicular) on an airplane is used to cancel or reduce the coupled effects of the motor on the airplane.
If the thrust angle is wrong, and you trim the plane to fly straight and level at one motor speed, changing the motor speed will act like you've just changed the roll or pitch trim. This is referred to as "coupling" -- A change in one control causes a change in a different axis. Changing the throttle, we expect the plane to increase/decrease speed. We do not expect the plane to roll or pitch up/down. With a bad thrust angle, the throttle is coupled to pitch and/or roll, since a change in throttle will cause the plane to change pitch and/or roll.
The up/down angle cancels pitch changes caused by changing motor speed. The right/left angle cancels roll caused by changing motor speed.
When the trust angle is right, you can trim the airplane to fly straight and level and changes in throttle will not cause changes in roll or pitch. We can then say throttle-to-roll or throttle-to-pitch are "uncoupled" -- a change in throttle will not change the other.
You can still have an airspeed-to-pitch coupling if your CG is off (if the plane is nose heavy or tail heavy), but this is a bit slower, and a weak nose-heavy coupling of pitch to airspeed is not a bad thing to have. this coupling will help you in stalls because it is self-correcting.