Every public API starts its life as a private API written for some specific application, and goes through many iterations before its finally carved in stone and added to the public API.
If Cocoa Touch doesn't do something you need it to, Apple's framework engineers want to know about it. File a bug.
Nobody, not even Apple, can develop a perfectly designed API by simply waving a magic wand. It takes a lot of time and careful consideration, and involves feedback from developers because they're the ones who have to work with it. Otherwise you end up with an inconsistent mess that's a pain to use.
If Cocoa Touch doesn't do something you need it to, Apple's framework engineers want to know about it. File a bug.
Nobody, not even Apple, can develop a perfectly designed API by simply waving a magic wand. It takes a lot of time and careful consideration, and involves feedback from developers because they're the ones who have to work with it. Otherwise you end up with an inconsistent mess that's a pain to use.