I have the same phone as well, got to choose a phone for my work and the specs of this phone completely shocked me. Price - quality you can't (or couldn't) find a better phone. The camera has superb quality, but the firmware on the phone doesn't allow you to get anything near the full potential out of your camera. Something that Xiaomi has admitted as well.
If you really want the best out of your camera you'll have to install custom firmware. I'm not doing it as I can't take the risk since the phone is technically from the company I work for. But if it wasn't I would probably look into the option.
Nevertheless, even with that flaw the phone is still my favorite phone up to this day :)