Is that the only thing you don't like about the OP3? Because that clearly sounds like a hardware fault and OP should exchange it for a new phone. My battery life is so good I'm actually hesitant to exchange mine for the faulty accelerometer/gyro sensors. But since everyone else seems happy with their battery life I'm going to do it. It's always disheartening to have a defect after you've purchased a new piece of kit but even the Apples of the world produce the odd lemon. I'm going to give them another chance - I really think for the money this phone is such a solid buy. Only if my second OP3 has a defect I'll probably mark it down as fate and look elsewhere but I'm still keen on the 3.
On the RMA process side, they seem to be organised in so far as L1 support schedules an appointment for a remote session, and they tell you in advance all the files you need to download in advance. I actually missed their email (busy doing other stuff) last night, so I logged into live chat and they scheduled another remote session appointment for this evening. So even though it's taking some time, I've been happy with the level of communication and follow up so far. I'll report back in when any next steps take place. Given the errors I'm seeing in the Sensor self test when I dial *#808#, hopefully there'll be clear direction after the call.