Stable release: Mesh distortion; Scene graph editor; Local file/folder saves & more.
100% behind this. Being able to spawn child objects based on their relative positions, as opposed to them defaulting to the parent object's X/Y, would be a huge time-saver. I've had to create some fairly cumbersome functions to do this currently; having the hierarchy system be a little closer to other engines' prefab systems would go a long way.