Yes bro I've downloaded it. I think there was some problem in the OTA update as my friend's update of 501MB got failed while installing and immediately after the phone got restarted a new update came of 1.6 GB! After it I think about few hours the update got suspended that's why users now are not seeing the update. As far as my experience as of now I think the UI speed is much faster from before but I'm facing a huge battery drain I don't know why.
Yes UI is new n Speed has increased a lot .. Also Hide App option also now available so all good for me including baterry . I think you need to charge from 0-100 once to get more baterry.