Special effects I would have done differently
There is a scene where the dolls heads start morphing. rather than a close up of the heads as they morph, I would have done it as a panned-out view of the entire wall, with morphing effects applied as small detail, rather than taking up the entire scene. Or maybe some close up morph shots after some views of the entire wall with small morphing effects
also at the end standard effect seems to be a shock at the last second (horror isn't my genre). I would have had the younger aged woman lean into the camera more slowly and change to the older woman, rather than a quick 'scree'. shrug.