This shot is an excellent representation of where utilizing the rule of thirds (http://en.wikipedia.org/wiki/Rule_of_thirds
) would have made it over the top. By the way, nice shot, but some different framing would have made it amazing.
Think of the reflection as a third, the trees down the middle of the image as another third, and the sky being the top third. If less sky was present and more reflection was there you wouldn't be asking about whether it makes sense to crop the image or not
In my opinion, your photo is about as post-processed as you can make it. The only way to make this image better is to retake it.
And again, don't take this as "your photo sucks" because it doesn't; this is a critique thread.