I wish you cropped a little bit more at the top, the structure(s) up there is very distracting. Also, I love cattails, but I can't make out any of the flowering spikes in your shot. Sharper focus would help as well.
This picture feels a lot like a snapshot, and doesn't really do it for me. I would like to see a bit more of the parts above the lake, seems so much prettier. 5