CMF Phone 1 | Global

Hello people. Since the 4.0 update i am facing severe battery drain on idle. And getting an avg of 6.5 hours of sot on wifi. I am also very unhappy with the camera performance since the update. So i was thinking either to install a custom rom or downgrade to nos 3.2. But I have a few questions. 1. Is 6 hours of sot normal? 2. Should I downgrade or install a custom rom? 3. If custom rom is recommended then please suggest me one which has nos type home screen widgets (if there is any) TIA!