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They are certainly more aligned with the Giants/Steelers etc... and I agree you have problems on both sides of the line of scrimmage but I believe that ultimately Jason Campbell will not be the answer in the West Coast Offense that Zorn wants to run.
...the answer depends on what the question is. If the question is winning Super bowls, then the answer goes right back to the rest of the team; better quarterbacks fail all the time until the other pieces are in place, Elway for one, and decent QB's are part of winning teams, all the time, Eli for one.
Brad Johnson, Trent Dilfer, Eli, Dehlomme, whoever was calling the shots for the Bears a few years ago, McNair, Doug Williams, Mark Rypien, Joe T, Hostetler, Simms, there are plenty of guys who either won or at least got there who were for sure considered not the guy or maybe not quite the guy and there are the For SURE the guy types, Peyton, Favre, Elway, Young etc. who did not make it without a few more critical pieces being added. Add Marino to the mix.
There are only two guys I can think of who come closest to being one word answers to winning the SB; Montana and Brady.