I would like:
-bigger battery.
-more colors at launch.
-brighter notification led
-more clock styles for AOD. Also more info on AOD.
that's really it I guess.
Well battery and colours wouldn't be a software upgrade but, I agree with the Notification DIM factor.
And my thing is the Lock Screen clock which has NO options, at least AOD clock has a few, but yes would be nice to see more all around