This update include:
Procedural eyes is a polysphere with the possibility of change sizes of the pupil. Changing of the shapes created without any blendshapes. For this using skincluster and joints follow by sine and cosine functions.
Inbetweens its a feature for creating corrective joints for elbows, shoulders and so on. Usually this joints crating with driven keys, now it can be creating very easy for left and right side of the character.
ChainIk module is a improved version of the old dynamic chain module. It can be as with dynamic so without it.
Inbetweens and procedural eyes available only in full version only.
The video about it