Exactly the same here. If someone else makes a phone with the battery life of a P2 I would strongly consider it. Love this phone for that alone. I couldn't go back to a normal battery now.same, when I bought it, next update was in testing. then they pulled it. Very disappointed. I hope Lenovo change their updates (they're moving to a stock android I believe so some hope) as I like their hardware.
However, I couldn't go back to a ~3000mah battery, which makes finding a phone with good updates hard.