The shadows in the foreground appear very dark, and the grass does not look quite right. I think you may have pushed something on the processing too far. Overall, I think it is a nice scene.
It's a fine composition, but indeed some tones are odd looking.
I have to agree with the B&W treatment. Some areas look flat (not much contrast) and others look a bit strange. I think that spending 5 or 10 minutes to redo B&W treatment wouldn't be wasted time.