Some props have built in animations to simulate things such as tree leaves being pushed around by the wind. I think it would be great if we could change the speed of such animations in the individual settings of a prop. This would help with cases such as when you place a tree indoors where there should be no extreme indications of wind, or when you modify the scale of a prop and the speed of its animation no longer seems realistic.
Edit: I should note, the speed already does change when you adjust an object’s scale, but it would still help if we could set it manually. The animation speed shouldn’t necessarily always scale the same way.