You should honestly consider making Shaders free to use until the engine upgrade is there. Right now simply removing the fog can give you 10-20 extra frames which is just ridiculous and aids as a band-aid for the games pretty bad performance until the engine upgrade is out. I can see why it is a risky thing to permit but it would make sense as it makes the game more enjoyable to play and gives you guys the opportunity for a completely fresh start when it comes to modifying game files after the 3.5 update. (Could also simply encrypt the files)