So what is new in Maya 2016 extension 2?
Is it a minor release or not?
Well it is a major release with good amount of stuffs like
new render layer manager
Mash for Motion graphics
New rigging tools
Reworked bifrost andXgen
with several additions and improvements for modelling.
Read more about the Maya 2016 extension 2 @ Autodesk Area Blog
What to expect in Maya 2017?
Well Autodesk show some cool features in NAB 2016, which include several improvements and addition in modeling and motion graphics.
You can jump to Autodesk official Youtube channel.