I must admit that was one thing I never understood with the M8 (which is why I got an S4 instead of it), was the camera - why they put such a low one in in the first place I don't know. Nice they're updating though - looks to be a bit of a refresh from them then rather than any new models?
Must admit, loving my OPO still - been playing around on this custom ROM for a week now and it's brilliant, used 2% battery in the night (8 hours), and reports of people getting 6-10 hours of screen time, or 5 days very light use/idle LOL!
Got a tempered glass screen protector for it - highly recommend them over the normal ones if you're thinking of getting a screen protector. I only got it as the screen left so many fingerprints, and this protector is way better. Plus, it's protected now too :] - it was also way easier to apply than the film ones, no bubbles at all, applied and I was done!