Unfortunately my L930 is behaving much worse with RS2 than with RS1, even after upgrading it to the lastest firmware available in
http://lumiafirmware.com/. I will enumerate what I remember:
1 - The double tap to wake most of the time works only after two attempts because in the first the screen just blinks.
2 - In Twitter, back to timeline after viewing a twitt takes several seconds and the scrolling of the screen is choppy, laggy, and sometimes does not work at all, making me having to wait several seconds to the timeline to became "browsable".
3 - Enable or disable a program from running in background takes from several seconds to several minutes each,and some of them, mainly from MS, can even hang the system, demanding me to force reset, and of course I have to re-do all the on/off settings again, taking care to no touch in such "bugged" programs before the others.
4 - Sometimes the webpages reloads randonly, even with no other program in the background.
5 - When the camera is opened the screen blinks before you can use the program, and:
5.1 - There is a lag when you press the button and the app taking the photo.
5.2 - There is a lag in photo-to-photo that prevents you from taken photos of non-statical things without getting a blurry photo.
5.3 - The focus is slow, what I think is the culprit of the two sittuations above.
5.4 - The itens 5.1, 5.2 and 5.3 are the same that some users says that occurs in the Xiaomi Mi4 with W10.
6 - The alarm and the ring tone sometimes gets very distorted.
7 - Switching youtube to full screen or changing the orientation results in blank screen for a second or two.
I am really sad about that, because I bought a used L930 to replace my broken L635 and enjoy a upgrade that was being praised as the fastest W10 version until now.
If this situation does not change after the next Patch Tuesday (05/09), where the version 15063.296 (or later) can be released, I am going back to RS1, where the version 14393.1198 (or later) can be released.