I'm used to use Google quick controls(Quick Controls is a small navigation menu that appears when you place your thumb on the right edge of the screen)
After update to Kitkat this seems to work very badly on every side of tablet (on padfone station only) It disappears immediately so impossible to push anything.
Also browsing and scrolling (Chrome/native browser) is worst and inaccurate on Kitkat than it was on Jelly bean.
Did you manage to find some solution? also you know what is anoying, navigation on PF station is in the middle (on Kit Kat), you can't use it when holding in both hands.