There is a lot of information to be found here already in the forums as well.
Also plenty of posts stating they have upgraded and then reverted back to Legacy or left EN entirely and have given their reasons why.
There have been plenty of forum posts complaining about upgrade nags. To be honest though, I have to believe that anyone that uses the app even a little must know there is a new version out there.
Increasing communication with users is always a great and welcome idea.