Some more updates after one day of usage.
1. Memory usage went up to 750MB all the time.
2. It is taking lot more extra time to charge. (phone was switched on when I was charging)
3. Battery usage seems like gone down. (need to monitor more and figure out the usage)
4. UI is quite smooth and it is good
5. Photo tagging (with face tagging and adding annotation)
6. Some new widgets for favorites available