Is it possible to implement my own curve such as bezier or rotobezier? Some programs use bezier, b-spline, x-spline, nurbs, etc.
I would like to import roto curves from another package but they currently need to be baked per frame and often do not have feathering data.
If I could implement the curve types and feathering paradigms from other packages then baking per frame would not be necessary.
There are two types of masks native to AE. You have listed both. You can also import masks from Mocha. That's it.