Absolutely. Why couldn't he? The offense as a whole needs to progress though I feel like which would help that.
No, he just needs to be de-Tresselized. Once Meyer took a more hands on approach midway through the season, the defense got better. Once Fickell adapts to Meyer's philosophy he will be fine. I think Mike Vrabel as an assitant to Fickell will help him a bunch over time.