They purposefully put SD on it, so people buy MKIII. If they release the best features they can, at the same price, they will not have new features for the next camera release. The market is slow because of that, planned obsolescence too.
You know, I don't agree with Stalmanism copyleft, but the beauty of open source is this: fuck the market. MagicLantern did a revolution on photography and amateur cinema, Canon should formally thank ML devs (and donate).