I guess he can gasp as much as he wants if he isn't missing more tackles (although... he was missing more tackles)
And that's as long as the tackles he is making are just as effective, not allowing quicker PTBs or more assistance from teammates
Yep. This is the thing. We don't have a way of measuring this. Safe to say though that when any middle makes a lazy error or starts to become a liability in the ruck Fitz is quick to hook him.
A lot of it is game situation too imo. E.g. say they think Toby is looking gassed at the 22min mark, but the Sharks score. Fitz says "tell Toby he's off after the kick-off set" because he'll get a 3min rest while they take the conversion etc,
... then someone drops the kickoff, Toby has to make 4 tackles in a row, and gives up a penalty for a flop.
Result = Fans say Fitz is an idiot.