How could only some of reality be repaired? I don't get this line of thinking. The purpose of the reset was to repair what the crack had damaged. Amy was the key by remembering the Doctor which in turn is the key to everything exsiting in my opinion. Now if in the future at some point the Doctor all of a sudden doesn't remember the Invasion we've got a major problem as I have stated before. Remember the RTD Daleks are supposed to be returning or at least Moffat has said they're not totally gone.