If you watch the games you can see the truth behind the cliches.
Ghost is road kill deep in the D-zone, gets pushed out of the crease, beat behind the net, tries to avoid contact - that's what happens when you're a relatively weak 180 lb D-man. Unfortunately, at 26 he is what he is.
Farabee tries really hard, but although he's much stronger than say Ghost at 180 lbs, it's still 180 lbs and when you go to dirty areas, hard to hold your ice against 200+ lb opponents. When he fills out the next couple years he'll become a much better player, the way Lindblom has emerged but faster.
Frost is wonderful in space, like a faster (younger) Giroux, but he can't handle big centers and on the road, teams with centers like Barkov will match them against Frost every chance they get. He'll get stronger and better at using leverage and positioning over the next few years, but he hasn't had to deal with this issue night after night in the CHL.
TK and Lindblom shows what happens as players mature, TK is probably up to 190+ lbs, and has the same fire and speed, but now when he fights for a puck along the boards he can hold his own, and you can't bump him off his stride easily - the fireplug body filled out. Lindblom was full sized when he came up, but two years later he's become lb for lb one of the strongest players in the NHL, winning the majority of board battles and throwing bigger players off the puck.