Today Samsung released the stable one ui 2.0 update for beta users in India as well. Update size was around 143MB for us. For the people who were not a part of beta group, the update won't be this small in size. Within 5 days everyone may get stable update. Kudos to samsung for releasing stable update before Christmas.
idle battery drain has been improved a lot. I did a factory reset after updating the phone so that everything runs crisp. Still have to check the battery performance as I updated the device in the morning.