He never said that they got deformed. He only said 'the koroks once took on a human form but the move to the sea changed them into what they are now but they are still my beloved children'. Where'd ya get that?
What do you call tp? Cheese Princess or Twilight Cheese? Anywho the koroks are not the same as the kokiri but rather an evolved form of the kokiri. I'll leave it at that.