So much emphasis on "Tough." Look at Nyquist (and Dats most nights) out there yesterday just skating and backchecking and picking pockets then turning the puck back and taking it straight to the net and making chances. That EFFORT makes up for any size. I'm not against size - but I think we can still be effective as a skilled team. We always have been to some extent. There was this guy Lidstrom that played defence pretty well and never hit anyone and he did pretty well along the boards and in all areas of the ice.
EDIT: the key words I would use is "tough to play against." A line can still be skilled and small and be hard to play against. Being tough to play against is all I care about.