So my observation of what's new and improved on the 4.4 galaxy s5 updates are the unlock from Lock screen to homepage is faster, animations are much smoother and the device over all just feels smoother. Multi view has been enhanced, now has the same features as the new note 3 multi view. Notification toggles edit option has been changed ie you can limit just seeing a few toggles if you don't have the need to swipe for extra toggles. New full screen lock screen media playback (also negative) and Standby seems to be better. negative I have found is that the purple smearing in settings is more noticeable again like earlier firmwares and In 4.3 they changed the black background to a very dark grey so there wouldn't be no smearing. Another negative the new full screen look screen media playback isn't as good as before. For example before you could have access to the playlist you were listening to from the look screen but not any more. the status bar background is now gone back to full black in apps that show it, pre 4.4 it was dark grey. Some things I wish they added was access to camera from lock screen with pattern or pin lock. You can still allow to take photos without giving access to gallery. I mean it's a bit stupid that to have quick access to camera you need to keep your phone insecure. Let's just hope that +Samsung Mobile
add the new tw to the s4 soon after the release of the s5.