[Captain Harkness]

Well his plot at the moment is all over the place but that is okay for now as long as it's all tied up in a nice little bow.
However a lot of the monsters Moffet has have been using visual elements as there key fear factor. Look away and your dead, Weeping Angel, The Silence, The Siren did it kind of in only something you could see a reflection in was a portal, The doppelgangers were exactly the same looks wise and that was once again there main fear factor, The creature from Vincent and the Doctor, Invisable, and the vashder navadar were also based on visual as when it's dark and you can't see, your dead.
As much as RTD writing in places left a lot of questions his monster were good, Slitheen, Absorbalof, Reapers, The empty Child!
They were all so different and always fresh. But now it seems too many of Moffets creations are based on visual fear.
As for Moffets solution Timey Wimey seems his big winner which worked once maybe twice but he's got to have some more solutions.