my first impression i am dissapointed with the update.
i was hoping the unlock direction could be configured to open specific apps or perform certain tasks depending on the direction of the swipe. as it turns out, you cannot configure it. using nova (and i suspect any launcher other than sense), the padlock performs the same action (just unlock the phone) regardless of the direction i slide my finger.
i also thought i could customise the theme colour. it turns out, we get only 3 ugly pre-made inflexible themes to choose from (purple, orange, dark green) and it seems i cannot get rid of the horrid green switcher colour unless i change the entire theme to something else and get instead a dreadful electric orange or purple instead. i just wanted the old light blue theme colour back and, sense 6, for whatever reason, won't let me choose a colour of my liking.
lock screen widgets now display an awkward grey frame when switched to and from - wtf.
also, before it was possible to scroll up a notification on the lock screen to open the notification's app directly. havent figured out how to do this with sense 6..
positives include the ability to unlock by sliding anywhere on the screen and the improvement on some apps - notably the camera.