it definitely looks soft w/o the usm. can you post where your AF point was in the normal photo?
With that focal length (10 or 22), at that f-stop, at that target range, it really shouldn't matter. DOF should be more than adequate to get everything in focus.
I would wonder whether there might have been some sort of haze causing the non-reflected portion of the picture to lose sharpness, while the reflection in the water would cure the haze somehow? Or I could be making it up as I go along. 

" The Wise and Powerful CDS
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