I have no issue really with Walsh not being picked when Ponga is in good form. I would just argue when we're carrying Shiba/Mam/Loeiro on the bench, Walsh at FB and Ponga coming on around a tired ruck could have been pretty dangerous and maybe make the team more dangerous overall, instead of picking a selection of out of form players.
Walsh has been injured prior to Origin 2 years in a row now, unlucky, but his chances will come.
For Broncos sake, we need this to be a kick up the ass for Walsh if he thought the shirt was guaranteed just because of how good he was to end last year, and we need Shiba, Mam and Carrigan to find something while working in that environment. Only Pat will see the field you'd imagine, but hopefully being in camp is good for the other 2.