In order to succeed in the NHL at that size, you need something else to make up for it. For most players who make it, its skating at an elite level. It could be shot, or hockey IQ too, but for most people its skating.
Locke didnt have the skating and its also why he was drafted his second time through the draft and not his first and he went in the fourth round.
Catton will be a first rounder, likely top 15 and maybe top 10. He has the skating and intelligence to get by. Of course no player is guaranteed though