I have a couple of suggestions for you to consider. For this image, I would bump the dark side of the histogram to increase the mood of the barn. For future shots, you might want to eliminate the front post on the right. It makes the image look unbalanced and tends to end up as the focal point. If you can't do it shooting landscape, try a few shots using a portrait orientation.
As for the wide angle distortion, sometime it helps make the image and sometime it is better to fix it. It is a personal preference debate.
Here is one where I think the distortion helps tell the story
Here is the same barn with it corrected.
And as you can see, a portrait orientation can work for a barn shot.
Tim