I think the narrative of him being a liability in coverage is being exaggerated to an extent. It was a bit of an issue as a rookie, but he made pretty big strides in technique after his initial campaign. Many talking heads were remarking on his improvement in that area early on last season.
I would also add that we will likely be playing a higher percentage of cover 2 or 3, rather than man cover, so I'm not sure he will even be asked to do the same things is VF's scheme.
The kid is a good football player. He will be fine.