It's all about their tackles on the offensive end. If they get good play on the edge their offense will be better. That said Murray is not a QB who is all-in mentally, and I think that makes them fragile. Best case is they make a run for the playoffs, but they'll get dropped quickly if they do. More likely is middle of the pack early, with a crash as the season goes on and the inevitable cellar finish.
I figured last season would be enough for the Cards to finally pull their heads out their asses with Murray. But they're stupider than I gave them cred for. Tune obviously did not impress last season in practice. Ridder is marginal as fuck. Maybe this will be the season that breaks their resolve on believing in Murray, though I hope not. I'd like to see them keep pissing away seasons with him.