Agree. Wagner is a bit like Sarah Hughes.
Ashley Wagner = The new Sarah Hughes (robust, great competitor, artistry will improve with time just enough to win OGM)
Rachel Flatt = The new Michelle Kwan (smooth, excellent flow, she wins by skating a well-balanced, whole, program rather than relying on a single killer move)
Caroline Zhang = The new Sasha Cohen (fragile, cherub-like as you said, has one or two outstanding moves but does not skate a balanced program)
Mirai Nagasu = A lesser Yu-na Kim (has about every element but not mature enough to put together a compelling program)