It's my distinct impression that the scrum which had been at least competitive, maybe even dominant, while Horwill was on, just went to pieces after Horwill was replaced. I don't think Douglas had the necessary impact in this regard. But I'd be happy for someone to give an account of how the scrum went with different pairings of locks during the game.
You are mixing up job description with effectiveness
My point wasn't really saying Douglas was "good" or "bad" just stating that this is what he does as a lock and a general comment that lock type isn't appreciated in aus.