I think zoom could perhaps be improved a little bit in Ev4
Generally I find zoom (Android)is not as stable as in Ev3. It is all too easy to change the zoom unintentionally in Ev4.
Also when you first log in to Ev4 it doesn't return you to your previous last Ev4 session zoom setting.For instance I usually have zoom at 5nm in flight but the next time I go into Ev4 it will be on 15nm or perhaps higher. Not the end of the world I know but a mild annoyance.