Someone finally voted for it...
I don't see why someone would vote for something else. A single lightsaber is just flat out puny and two lightsabers is clumsy. Double bladed is effective and efficient Jedi slaughtering.
Your saying 2 lightsabers are clumsy? Just think about the double-bladed. First of all, in combat you'd have to keep track of the positioning of both blades, just like dual but you have to always know during combat wherever one blade goes, the other is at it's opposite. And secondly, what Shin said.