I'd say that's less to do with captaincy and more a reflection on the players, coaches and the squad generally. Surely they've all played enough rugby to know if you're facing a rush defence you utilise specific tactics (short kicks in behind, second wave long passes) to combat it? That if the opposition aren't committing to the rucks and are instead spreading out in defence stymieing your backline brilliance, you start to pick and drive one off the ruck?
To me it looks more like a lack of composure among certain players who can't/ won't assess the situation and determine the best course of action - they become flustered which leads them to seek low percentage plays when patience and persistence may be all they require?
The youth have played enough rugby by now. That aside, who is going to lose their position to an old head? Certainly not Two Dads to Mortlock. They all appear to be there on form.
Sure, who?
You could select more dependable players, but they'll not offer anything other than consistency. No dizzying highs, no terrifying lows, just the ability to perform at a lower level, more often.