I'm not entirely sure but I believe it could be because with Toby being so slow he has to play more like Reynolds and straighten giving time and space to someone like Campbell to be the 'Cody Walker' on that edge. Given Isaako who's been with us 2 weeks is now in, they don't really trust the plays out that edge currently. Hence an inclination towards the left which doesn't seem to utilise the FB as much with Brimmo being able to get on the outside shoulder himself.
That obviously would be in conjunction with Toby himself being a very inexperienced half.
I couldnt believe though they never really attacked that makeshift left side of Parra. Surely somebody should have been getting instructions to them to pressure them.