| Another question that didn't at first occur to me:
Did you mean to leave Small characters out of this build? I doubt this was the intent, and I'm sure we can all appreciate the image of a battle-crazed halfling clinging on for dear life while gutting opponents. I get the feeling you can modify the versatile keyword requirements to better reflect Small characters opting for this build. Of course, this would also impact the text for many powers, if by "Large" you meant "one size category larger than you".
Of course, if you didn't want halflings taking this, you should probably make a size requirement for taking Brutal Fencer.
Alternatively, this could be a nice start for a slightly different form of Brutal Fencer, perhaps in a Paragon Path: rather than throwing opponents around, you actually climb onto them to deliver fatal blows. | 
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