[Xperia Z3 General] jemeljsh:
Agreed. IMO, Sony's lollipop 5.0.2 is an unfinished product in many ways. Rushed out and nowhere near perfect. Just look at the "close all" button in few of the .726 builds - OK, it's there, but it looks like its made at the very last moment just be there. IMO, .93/.77 sony's KK is close to perfect in every way. It's skinned out to perfection. I love the way how sony has made quick settings and notification panel in its KK's builds.

At the end of the day I could not find one reason why I should chose lollipop instead of kitkat. IMO, Lollipop's new notification system is overrated to say the least . Ok, now the notifications are accessible straight from the middle of lockscreen (instead of swiping down the panel), but so what if nothing else has really changed that much. I still I can't quick reply an sms with default app from notification panel or from lockscreen. Missed call in notification panel has "call" and "send sms" option same as KK does. Why does the received message only has "mark as read" option as it what is KK? IF this new notification is so spectacular it should have all of these options both in missed calls and received messages.

One more thing that a lot users find necessary - kitkat has sound/vibrate/mute option in quick settings as all previous android version do, but sony's lollipop as most lollipop builds has no such option. Samsung, at least for galaxy s6, in their lollipop 5.0.2 have implemented sound options in the quick settings, so it's doable.

One more thing I noticed is how jerky are animations in some of the messaging apps (even the default sms app (the new message icon sometimes jumps from down to bottom if accessed through recents) and in whatsapp when you have a group message box (empty chat with opened keyboard) the animation will lag while switching between apps and going back to whatsapp which has keyboard opened (the animation slide up will break the app in half if I can say so). No such thing in KK, but this I think is more fault of the app developers since its how the particular app reacts to lollipops new slide up animation.

Also when you use a different launcher like nova launcher for instance or any other launcher that has "gesture options" on lollipop and set "swipe down" as command to "open notification panel" the first time you use it on a new notification (either new mail, message, print screen or whatever that appears on the status bar) it will give you a jerky animation. This is due to the "2 swipes to get to the quick settings" / "two finger swipe to get to the quick settings" and the fact that developers of nova and others still have not tweaked it to be fluidly applicable to lollipop.

Also about the dialer -> Sony's KK has a perfect dialer from which you can swipe left and turn to your contacts immediately without opening new app/window. Sony's lollipop dialer has contacts as a separete app. Sure the new dialer has the shortcut to contact (located on top right which is not so easy to access..exdialer is better in that way as alternative) but it's much better to have it "in it" like in KK.

Finally please pay attention to brightness level after upgrading to lollipop. Maybe I am wrong but to me it seems that with lollipop maximum brightness is not as bright as it is with KK and adaptive brightness in somewhat similar lighting gives lower brightness screen.

These are my impressions after 3weeks with lollipop after which I went back to KK on my Z3. Will wait for 5.1 to come out and see if the mentioned issues are resolved.