Well, I did just that after several m4/3rds bodies. I'm convinced that I can produce pretty much what I always have before on any other APS-C camera and although I have a hankering for the Pentax K30 I doubt that I would get anything much better out of it unless I used it in really low light and I try to avoid that whenever possible anywayThis thread almost persuades me to return to m4/3rd.
...I'm starting to learn to shoot with the real-time histogram, something I've never done before.
Archiver, Did you see the DPReview article on E-M5 settings:
User Guide: Getting the most out of the Olympus E-M5: Digital Photography Review
You can set the camera to show you highlights and shadows as an alternative to the histogram. I tried that and found it mildly distracting, but I might try it again. You can adjust the sensitivity of each setting.