Hi,
Character Animator has many great built-in tools for adding dynamic motion and animations with swap sets, cycle layers, controllers, replays, magnets, etc. But I think it would be really awesome to have a pin or point added on the mesh in record mode that can be tagged as a "null layer" that is attached to the .chproj file or exported to After Effects as a 2D position tracker for adding extra elements in the compositing phase that can be connected to a character or an animated object.
This would be valuable in that AE's plethora of built-in and third-party effects can be added to 2D characters with a direct position link of a layer animated in Ch. without having to track or position manually. Also, to not have to pre-render animated effects into image sequences to bring them into Ch.
-Andy