I have one suggestion that would greatly improve rotation of pixel art...
I don't know if Clickteam heard about this, but there's an algoritm that called RotSprite, it's dramatically better, this could be an middle option (or completely replace the 0) for the quality setting when changing the angle of an object.
I believe the algoritm works by upscaling the sprite with Scale3X algoritm (or simply scalling 8x), rotating it and then downscaling to the original size or something like that...
To avoid introducing a new color, the averaged color is then snapped to the closest color in the palette.
(open the image and zoom to better see the effect)