Yea, I think KVO could be done better. As I recall, Ember properties were pretty neat, and had a nice way of specifying dependencies. A lot less awkward than a

Yea, I think KVO could be done better. As I recall, Ember properties were pretty neat, and had a nice way of specifying dependencies. A lot less awkward than a bunch of + (NSSet )keyPathsForValuesAffectingValueForKey:(NSString )key methods. I'd also want more strongly typed keys, less strings everywhere. I do use NSStringFromSelector as much as I can, but strings are unavoidable in IB. Also the handling of one-to-many dependencies could be made a lot more intuitive as well.