It's really not a major reshuffle. Capewell/Campbell come into 5/8 halfway through the first half, shuffling Bird into the back row or even giving him a small rest.
Having Campbell on the bench to be a replacement hooker or whatever he is currently doing is not working. I have major respect for Preston, it's not his fault he is playing out of position.
This set-up allows us to have all our best players on the park.