Depends on Talib, and even outside of him the secondary has been playing well and you still have all the top pass rushers and really, Mayo was good, not great, in coverage.
The areas most worrisome to me given the injuries are specifically the run defense on early downs and especially in sub packages. This is why I think (as long as Talib returns sooner than later) they can be okay in the long run. It’s a passing league and if they can continue to get great back end play from McCourty, and physical performances from Dennard and Arrington, I don’t think it will be the shredfest of the last two seasons.