I also have not experienced any problems with my camera. I guess the ones that have a camera that's okay don't feel the need to comment on that thread, making it look like almost everyone has it.
And yes, it does get warm at times. It shouldn't get any hotter than, say, a Galaxy S4 (same processor, but slightly higher clocked), but it is possible that it's easier to feel because of the aluminium design. If you wouldn't feel the warmth, it'd mean all the warmth stays inside the device, which in turn is bad for the processor.