I like it as it is, the armpit is a natural position for a sleeper, it's not the perfect crop, but the thing is, some photographs doesn't need to be neat to be beautiful, it's great as it is.
Such a moment is unforgettable and really touching, the way the dad's arm is around the little precious one, protecting him, while he's deeply sleeping, showing the natural instincts of fatherhood.
Of course retouches, such as a closer crop, ignoring some items that are not necessary, like on the left side, that part of the "comodino" and stuff on it...