As we all can agree, improvement for manly this year isn't about beating the bottom 12 teams by 50-0, it's by countering the top 3 teams. It's defence, it's presence, it's mobility, it's competitiveness, competitiveness, competitiveness and competitiveness.
We shouldn't be significantly impacted by the return of Schuster and Walker. And if we are, then that is the problem. If two injuries causes our game to implode, then the team is too fragile and they need to be treated by the coaching staff differently.
An engineer would design a structure that can withold under some adversity, and it is clear we are still very much in the process of being designed. However, I don't think Schuster and Walker had too much bearing in this game. It comes back to the points in the first paragraph.
Rd 1 or not, we were exposed and that is a great thing, so long as the coaching staff don't move on and forget it. Sports constantly evolve. If a problem comes up early at any point in the season (eg. a strong forward pack begins to look slow, passive centres, etc) then we need to adapt our game before history repeats itself later on.
The problems last night weren't the first we'd seen them. They are part of a pattern, and just a few slight changes may break us out of it. A mobile lock (not jake), increased workload from the backline, simple direct attack, dropping an experienced forward for youth, instilling a frantic, exaggerated struggle in the play the ball and gradually...eventually, the brainwashing of our players into cold-blooded (rugby league team) killers. I don't see any significant changes there.