No, he doesn't, can't, be deeper. The problem is that our pack is going backwards, was going backwards. It actually gives the opposition line speed about 2 metres of advantage. A stable scrum would be better, an advancing scrum even better. He and Porter, and the rest of the line were back pedalling way too much. When Alfie came on, when the other replacements came on, that stabilised, but way too late. The reverse also applied. When we were defending, our line had to step backwards, and that causes it to become disjointed and leave holes. There is a reason Tigers are so dominant this year. They push their opposition back.
We have had a few games where our defensive line kept pushing the opposition back, like against Chiefs. When we do that, our backs are unlocked in attack, and shut the opposition backs down in defence.