Whilst the dash thing has logic to it, it would create a game balance problem.

The reason for this is that a warrior can combine polearm spec with either hand spec or whip/flail spec. They can then use the other spec to put a character unconcious. This enables them to deal very significant damage with the charge. To enhance this any further would mean a death sentence for a lot of characters against a polespec, as soon as they get stunned, if they are alone.