To improve yaw response (especially for VTOLs) it is sometimes desirable to mount the motors at angles that allow the thrust direction of the motor to contribute to the yaw movement.
In the (non-coax) quad case (seen from above) the front-right motor should turn anti-clockwise, which means that it should speed up if we want to yaw the craft clockwise. In this case we should be able to improve the yaw response by tilting the motor to the right or to the rear.
In the co-ax case the top and bottom motor turn in opposite directions so for yaw, if the one speeds up the other will slow down, so I would think that tilting the motors won’t have much effect on yaw performance.
Is there something one can do about this? I.e. make the top/bottom motors work harder or only use top/bottom motors for yaw control?