I don't play MK9 so maybe I'm wrong but the projectile game just looks stupid.
maybe I'm remembering this wrong but I think MK9 has gone through patches that have significantly altered the core gameplay. enough that it really frustrated some of the top players. I'm no MK9 player either though. I think thundersheep plays it. maybe he can shed light on the MK9 situation and whether the balance/gameplay changes are projectile related or not.
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http://www.youtube.com/watch?v=npHDxSvwCE0