Skew function like old 3D Studio?

Yes there is. It is a fundamental part of some of the other editing tools.

Did you look at the post about the rotational skewing. There is an animated GIF there.

A transitional skew works the same, only with the MoveTool. Just Grab a face (of a 3D solid,) hold and drag to skew.

Here is a team member explaining how to taper a cylinder.

Here is a animated GIF in another topic, of tapering using the MoveTool upon cardinal points: