There is nowhere to read about the Sequence Visual Editor: it's just in my personal "new features" list, and I don't want to advertize it until it's ready (especially since I still don't know the timing)
In short, it will be like DOTweenAnimations, but instead of being attached to the target to tween, it will be a separate gameObject, and you will be able to add different gameObjects to it, with different tweens, to tween them as a group. It will also return a
Sequence instead of a Tween, in case one wants to do additional stuff via code.
About Bezier curves, they're actually in my todo list, but with very low priority, so I don't have a schedule for now.