Dave. I think this will come through as a rather polarizing entry, either love it or hate it. In other words know the risk before jumping in.
Despite clouds suggesting a fair amount of sun this has a very even tonality to it, possibly from HDR processing. There are a few deep blacks, but not much in the white whites zone. As a result, less character than I would expect from those conditions.
Secondly, especially in the sky there is a mottled granularity suggestive of heavy filtration or application of an effect, or two. Often a bit of that goes a long way. But when it become one of the primary impressions of the image start thinking about backing off in the processing.
You might also consider darkening some of the grasses in the lower left corner and along the bottom. They tend to pull your gaze outward instead of directing things inward.
Finally, I agree with earlier comments about tight cropping, especially from the left. That is just an unusual enough tree shape that including more it would be helpful.

I like it Dave, I really do. But to lift it to that stratospheric level, (to me) there seems to be something missing. The scene is very peaceful and scenic, and that in itself creates a mood. The panoramic interpretation is perfect. Overall though, it just seems to fall a little flat. Ok . . . me fantasizing here. Imagine a wood duck (close to the foreground) breaking flight from the undergrowth and heading water-ward. Perhaps the bow of a dilapidated dinghy; broken fence posts peeping in from one side. In that instance your image would leap from the page, become almost 3D and be a winner. I'd be really interested to hear the outcome of your endeavours. And good luck, by the way.