SE (selection explorer) has seen some major improvements. It was the thing that held me back from switching to 2015 but I actually can't wait to install 2016 and start working in it.
Also, viewport speed was greatly improved in 2015, 2016 has seen another boost so anyone getting low fps rates in 2014 will be surprised.
I am also looking forward to work with the physical camera in Corona. I prefer this over the modifier approach, should be straight forward to work with, hopefully.