Not really, we have to fit 4 shoulder buttons, microUSB, microHDMI, full-size USB, and possibly a miniUSB and EXT port back there.I'm sure you could fit a 5mm hole, failing that I gave a second option.
Nice in theory but as I found when I purchased a similar LED keyboard light, that sort of 'bendable arm' doesn't work well in practice. 1) It puts a fair amount of strain on the USB port, which has to support the entire weight of the device, and 2) There is no fine control over the positioning, If you make a slight adjustment it just goes back to its previous position, which means that if it's slightly out, getting it pointing in the right direction can be hell.
Recently Nintendo changed it to L+R, which is much better because it's harder to do by accident.The 3ds has it that you have to press L and R to go straight to the camera. Maybe we can have that.Shoulder trigger button for shutter too, I love using my phone's physical volume buttons for shutter and video capture... Using on screen buttons rubbish
All he said was it had a downside for some places. All it takes is some tape for those times.