There is a line from Dante that says, "The arrow seen before cometh less rudely. " President John F. Kennedy put one aspect of the same thought into one of his state of the union messages this way: "The time to repair the roof is when the sun is shining. " The Boy Scouts say it best of all: "Be prepared. " That isn't just cracker-barrel wisdom with us; it is theology. "If ye are prepared ye shall not fear. " (D&C 38:30)
A criticism is just a really bad way of making a request. . . so just make the request.