3.5 is open source now, I think. Well, maybe not "open source", but under some similar fair use legalese thing. "Open Game License":
http://www.dandwiki.com/wiki/Open_Game_License_v1.0aFrom the little info I saw on the reddit, seems like some significant changes were done.
Personally, I have fun regardless of the system, though I favor some over others, and see some as more "balanced" than others. Really, though, DM can adjust things at will, so balance is more the DM's skills than anything.
Maybe we'll try your system when it comes out.