A couple of general observations...
I'm not sure what 'wow and 'pop' mean in an image. If it means anything, it seems more about technique, lighting, lenses, and subject. I could easily go and borrow a Nikon D800 or Canon 1Dx and produce the most 'un-wow' pictures you could imagine.
I'm also getting some deja vu from some of the other comments here, which seem very similar what you would often read in this forum as people moved from cameras like point-and-shoots to the K-x, or the K10D or K-x to the K-5 or K-5II, and were disappointed that the new camera didn't produce images as good as their old camera. It's a common transition experience.
Another transition issue is with all the RAW processors and image editors out there that still don't properly 'talk' K-3. I also suspect Ricoh themselves are still in a transition phase with the K-3 firmware. I expect more tuning will be going on there too.
Finally, on the same theme, I recall Nikon releasing a '
Technical Guide' PDF paper about the D800 specifically designed to advise upgraders (especially from the D700) that they may need to adjust their tools and work practices to get the best results out of all the new megapixels of the D800. As the foreword to the Nikon guide says: 'Realizing the full potential of a camera with over 30 million pixels involves a thorough appreciation of bokeh and blur, careful selection of settings and of tools (such as lenses and tripods), and working with the best possible subjects'. Some of that advice may apply to K-3 users and upgraders too.