After watching the draft this past week, Shep clearly didn't fit what the Bills are after.
Not only has he struggled to make plays in his time here, but he doesn't give you scheme diversity, and he doesn't have the speed that was so desperately coveted in the draft.
Could the replacement be Dansby? Maybe.
If not, I would expect the replacement to look a lot like someone with coverage skills, blitz skills, and speed.
According to Wiki, Hughes speed in the 40yd was 4.56. He may well be Shep's replacement and there is no Dansby.