Zaven was decent at everything other than getting to the QB last year. Lorenzo Alexander talked about him during the off-season and was saying that from his film study, the Cardinals didn't really just unleash him as a pass rusher and that they needed to let him just go and do it.
I think with BJ's injury, the Cardinals are now kind of forced to use him as a pass rusher quite a bit more. They also have to consider using Mack Wilson at edge too.
White BJ didn't show much last year, the Cardinals were expecting a big jump, so it's a huge loss overall.