I wasn't meaning to attribute the loss entirely to Matt Hodgson. It is more that I am not a fan of two 7s being on the ground at the same time. Maybe, it's as others have pointed out that it brings about a loss of balance, but I really think it hasn't worked as a rule.
Therefore, I wouldn't like to see Hodgson come on at 6. The only situation I'd see him being effective coming off the bench would be to play 7 if Hooper goes off. Certainly, if he replaces McCalman, we will have a very undersized backrow and could be in awful trouble.
And if we happen to be behind in the last 15 - 20 minutes, I can't see having an extra smaller bloke on being much help at all.