Well, two things-

1) The new regime just got started, and Rome wasn't built in a day.  We still have the draft, and all those draft picks, and since we have done a pretty tremendous job shoring up the defense, that leaves a lot of draft picks to address our remaining needs.  

2) It's a lot easier to pass protect when you don't put yourself in obvious passing situations by falling behind in games, so shoring up the defense should help the pass protection a lot.  And, we had a pretty strong running attack last year, so combining that with a good defense will help the pass protection a lot.  Also, there are a lot of things a QB can do to protect himself such as not holding the ball too long.

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