You certainly baited the thread with your comment, "Here come the croppers." If this photo had been posted by anyone else without the "croppers" comment - yes, you would have received a slough (slew?) of critiques suggesting cropping. But you are Russ, and everyone who reads & posts regularly knows you're attitude about cropping, and, with your photography, you have demonstrated a level of ability that would preclude many from taking issue with this photo. I can hear them now, "yup, this needs cropping, but, hey, it's Russ. He knows what he's doing."
Well, thank goodness someone had the fortitude to stand up to you - thank you Jim Pascoe and a +1 to you, too, Slobodan and Jeremy.
Yes, the photo "needs" cropping to fall within the "rules" of "good" composition. And, yes, there are times to break those "rules". In fact, purposely breaking those rules, like you've done, sets up a purposeful tension, a dissonance that creates a kind of dialogue with the viewer, with the viewer thinking, "Gee, this really should be cropped. But the photographer didn't. Either he really knows what he's doing or he's a rank beginner who desperately needs some lessons in composition." and the photographer simply replying with the photo "as is".
So, this begs the question, are rank beginners who don't know how to compose simply skipping the seemingly unnecessary learning and getting right to the free-thinking "art" of it? Or, should more experienced photographers stop hiding behind their flaunting of the "rules" and realize that sometimes photos need cropping? Or should we be free to do what ever the heck we want with no room for criticism because we are free to do what we want and that's our "style"? Or...
Besides, when camera formats were decided all those years ago, who knew the world doesn't always appear in a nice, neat 3:2 (or 1:1 or 4:3 or 4:5 or 1.6235:1) ratio?
Personally, I'd crop this to 1:1 cropping (yup, I said it) from the left side as suggested. But, it's not my photo, it's Russ's.
(Edited for spelling and adding Jeremy to the list of croppers.)