3d cursor when placed will align to the shape of the face and not just the normal.

when the 3d cursor tool is used it can project onto the geometry, but it only aligns the x and z rotation of the 3d cursor to the normal of the face.

It would be really handy if the Y rotation of the 3d cursor could be aligned to the longest edge of the face.

Useful if you then intend to use the 3d cursor to place new object, and even more useful if the snap menu allowed to match the rotation of the 3d cursor (not just the location as it currently does).