I think that when Murray does what he does this year, which is disappoint, the Cardinals grab a QB in the first 2 rounds next year in what looks to be a great QB Draft.
NFC West looks pretty wide open this year actually so maybe he and Harrison Jr. find something? But if the Cardinals want to be Super Champions? It looks like a long shot they'll do it with Kyler.
I also don't think their team culture, environment, fandom, stadium, all of it... is optimal for playoff success. They made it with Warner so it can be done, but that was a great roster with a HOF QB.