I’ also would love to have shape tweening
it’s useful and time saving in many long and smooth animations (think at a liquid sway in a bottle. 3 or 4 key positions and a long fluid animation)
we could start with a very basic functionality (shape with exact same number of vertices and no hints inbetween start and end)
basically have a shape to use as start. make a copy and move vertices to use as end. software calculates all frames inbetween
tween clip along a spline would also be very useful
definitely two feature I’d love to see