The other advantage of playing Schuster at lock is based on minimising disruption to the regular seventeen. We have Aloia, Lawton, Jake, Bullemore and Fainu who can all cover the lock spot.
Lawton is the obvious candidate to come in when Schuster has another injury, and he could be trained to duplicate most of Schusters attacking shapes at lock. This won't work for his more instinctive plays obviously. Lawton was a five-eight originally, who was then manufactured into a hooker, and then into the back row. He debuted as a centre in the NRL and played a few more games for the Warriors at centre as well.
As for Schusters next injury, it's not a question of if but when, unfortunately. Schuster at lock also provides Weekes with a permanent starting spot in the thirteen and more balance to the bench. We then have Humphries to cover DCE and Johns to cover Weekes etc Overall, the squad looks way more balanced with Schuster at lock. Right now his combination with DCE looks extremely clunk, and I have a feeling that the DCE/Weekes halves combination would develop more naturally than what we are seeing now with DCE/Schuster.