It's nice to see panos of Cannon Beach. I enjoyed a short stay there a few years ago. I can't say I like the treatment of the sky in the museum pano. It seems at odds with the sharp realism of the rest of the scene. All three need levelling though. Takes less than a minute in PTGui or Autopano Pro, so well worth doing.
1. I don't like the sky as well for the art museum either. I used the photomatix details enhancer TMO and the adjust TMO. I will need to rework the tone mapping as I understand much more than I did about this subject a few months ago.
2. I have also struggled with the leveling of my 360 panoramas. I need to get a more accurate level such as the crystal level that I saw mentioned on a German web site in addition to the using ptgui or autopano Giga.
3. There is no tone mapping in this panorama, but you can see the stitching errors, and it is slightly distorted : )
There's no need to struggle with levelling. With PTGui you can even level your stitched equirectangular image. 2 or 3 vertical line control points on some of the many vertical edges in the museum pano take only seconds to assign. Then use Edit->Level Panorama on the Panorama Editor window. It works very reliably and accurately, regardless of how well you level the pano head. See http://www.johnhpanos.com/levtut.htm.