After Dangerfield's first goal the obvious move was Smith onto Danger, seeing he is used to playing on mid sized and quick small forwards, whereas Rampe is more comfortable playing on taller opponents.
Smith is a good player. I reckon that if they thought Smith was any chance they'd have made the switch.
I doubt they'd play Smith on Fevola or Stringer. Danger is 95 to 100 kegs. He's a key position forward he's just a bit shorter.