Utah will reload at CB, in terms of raw talent. Utah has recruited better than ever the last few years in the secondary that they ever have. That has some intriguing potential. No doubt, they'll experience growing pains. Especially with teams that have that 2nd or 3rd WR to watch out for. Not sure BYU has that.
The B - quartet of Boobie, Blackmon, Ballard and Blair will be stellar. Two are eventually NFL-bound, one has starting experience and Blair, coming in for Chase, is the unknown. The 2nd CB is probably the bigger concern for Utah, but I don't think BYU's WR2 is proven enough to take advantage.