I wouldn't put Colberg in the smallish player, 5"11 is pretty much the average size in the NHL, Gllagher, Gionta, DD are among the smaller player in the league (even though Gally ain't in the league yet) Hudon is 5"10, that's gigantic compared to the other three and even if that's not his real size he could turn 5"10 by the time he makes it to the NHL.
I can live with 5"10 players if they are surrounded by bigger players : Patch, Cole, Bourque, Eller, Bozon and Galchenyuk. But three dwarfs (Gio, DD, Gallagher) on the same top-9 is pretty scary. And the only big forwards coming ar either bottom 6 (Berger, Shultz) or long shots (Quailer, Avtsyn, Pribyl, Geoffrion).
But in the end DD, Gallagher and Hudon were either undrafted or Late round picks, so that's just a treat.