LG G3 :: Blue Tint To Photos And Developer Options Menu?

I recently upgraded to the G3 (from an iPhone) and had a lot of trouble with call quality on the first phone so I switched to the S5. Long story short, I'm back to the G3 and am having some trouble with the new phone. The colors on the screen looked somewhat washed out and the camera isn't nearly as fast as the first phone - seems to take 3-5 seconds between shots to be able to take a photo (with just the 3 dots visible) or for the shutter button to reappear. It's the same whether HDR is on or off and if I swap down to 10mp I notice a lot of grain.

Colors looked washed out, faces had a blue tone and pictures were blurry. I did a soft reset and I also unmounted and remounted the SD card - no change. Finally, I noticed a Developer Options menu. After digging around on the internet, I thought this is a hidden menu that has to be unlocked? I decided to do a factory reset; the developer options menu disappeared, photos look much better although some pictures are still blurred and the screen looks much warmer. I have the Black G3 on Sprint and my Sprint Zone keeps saying there is an update but when I click on it, it pops up a message that says, "Update cancelled."