A plea to Olympus: Exposure compenastion in manual mode on the E-M5

Why not just assign the exposure compensation option to a function button? EC isn't available in M mode because the dials used are taken over by aperture and shutter. So if you assign EC to a function you can make your adjustments there.

I haven't tested this myself though and my camera is at home so can say if this will work but it's worth a try.