Bump.
Making this optional would be noncontroversial in that it "levels the playing field" for some people in a purely noncontroversial way (e.g. of controversial - a chess engine checkbox to compensate for my sub-par skill).
Since I'm fairly sure the tech exists , it should be a no-brainer feature addition if enough people wanted it.
What if instead of animation there was an arrow indicating the last move? This could be an option obviously. I agree that it's often hard to notice that a piece has moved so I lose a lot of time in bullet games.