I don't understand why someone doesn't make a battery that protrudes an equal amount as the camera hump. You should be able to easily get a few hundred mAh or so over the OEM extended battery, make a pleasing camera door that would basically run straight down from the camera hump to the bottom of the battery, and then could be slanted/curved down. If they were smart, it'd be a flat-topped triangle, like this:
You don't gain anything from having these little troughs on the sides/top of the battery, and they look awful.