I think basic issue isn't with Jake as such... it's the selection of Jake, and the impacts.
If Jake is the bench backline cover, then (if needed) it means either Moses or Brown are no longer in the halves. It's not rocket science to observe that when one of any teams' first choice halves are absent from that role, the team are more likely to struggle to score and/or struggle to defend in the way they usually do (and train to do).
So when Marata is unable to provide that backline injury cover (like this week, when we're down Matterson in the pack), it comes down to which back the coach selects on the bench. Any other back in the top 30, and with a backline injury it's likely it's likely we get to keep Moses and Brown in their halves roles (unless it's them who have sufferent the injury, in which case you'd expect Gutherson can cover a role in attack as needed).
Other backs in the 30 that could be used as bench cover rather than Jake? Perham, Opacic, Russell (when fit)... and then we get into development player options (given I think we still only have 29 in our top 30?). That bench selection/tactic is the issue people are having (among others), more so than having issues with Jake himself - who is young and tries hard at what he can do.
(Though the surname certainly doesn't help when the tactic is questionable...)
