I found the gestures on the fingerprint sensor are rather useless, maybe I am just too used to the way things have always been. The "tap for home" is a real annoyance actually, especially in apps that use the fingerprint scanner to log you in, it just returns you to the home screen about 1/2 the time.
As far as the camera goes, I'm spoiled and came from a Moto X Pure, which had amazing camera front and back... In the MG5+ the selfie camera sucks in comparison (I don't actually use it for selfies, but often to read serial numbers or mac addresses from the back of equipment in a data rack) but the main camera is decent, nothing amazing but nothing terrible, but I knew this going in and the battery life trade-off was well worth it to me. I was a little surprised at the low-light capabilities and the speed of the camera though, faster focus and time to first shot than I expected.