Walker offers cover for our back 5. The worst thing that can happen early in a game is to lose a winger. This leads to a centre having to go to the wing and a backrower having to go to the centres if you don't have cover on the bench.I like that 17. Last bench spot between Walker and Keppie is open to debate. I think we are a little light on if we have Walker and Lawton on bench. Croker can cover halfback if DCE goes down and Schu can cover Foz. So I don't know that Walker adds much off bench over Lawton. I suppose it would depend on match up and game plan. Good to have that flexibility of depth
The only other change I'd make is that once he gets some match fitness I'd start Vera and play Marty off the bench. That keeps one of Tent and Kapow on the field at all times and keeps that punch through middle and offload option going for full 80.
With Jake, shoe and Guac in the backrow they will all play 80 mins usually. Don't need a third big on the bench. Lawton covers backrow and hooker.