The lacking of detail in the arch is very much a turnoff for me, if even you brought the frame which contains this detail into your editor and placed it on "luminance" mode, and masked in the area affected, making fine adjustments with curves, I think it'd help a lot. Currently, it is a large mass of red which distracts me from the rest of the scene.
The second is interesting, albeit a little too "crispy" for my taste. It would likely work better as a print. Not sure how I feel about the blown out surf to the right of the frame.