I don't think Arpon's speculation on this is right. Hughes said in the past he does not want too many small players in the top-6, but he has never said if that line is drawn at one small player, two small players, three small players, etc. Drawing the line at Caufield only is Arpon's interpretation of Hughes comments, and in my opinion, Hughes behaviour does not match Arpon's interpretation.
Case in point is last years draft when the Habs picked Mesar. If they were drawing the line at Caufield only in the top-6, why spend a first round pick on a 5'10, 170lb water-bug forward who projects poorly in a bottom-6 role? Especially when there are bigger players like Bystedt or grittier players like Howard still available?