I dunno... I like Scandrick and he seems like a <decent> player. My gut tells me he is an average nickle CB...
I really don't have a great idea of who the best nickle CBs are, however, I'd venture to say Asante Samuel (Philly) and Sam Shields (GB) would be the best.
At the end of the day, it seems to me a nickle CB should be a starting CB in waiting -- and I'm not sure Scandrick will every be capable of being a full-time starter in the NFL.
On the other hand, I never thought Tramon Williams was going to be anything decent either (he was GB's nickle CB behind Al Harris and Charles Woodson) and he ended up having an all-pro year.