In the interest of competitive football, Fresno State will make a nice addition to Utah's schedules in 2014 and '15. As a substitute for BYU, Fresno State makes no sense at all.
If the point of suspending the rivalry with BYU for a couple of years was to balance the Utes' schedule in the seasons when they'll meet Michigan, how does playing the Bulldogs help? FSU is 9-3 this season, including a 69-14 win over Colorado. The Bulldogs' losses were to Oregon, Tulsa and Boise State by a total of 28 points, so they're at least as good as BYU this year, anyway.
As Hill said in explaining the temporary end of the rivalry, "I can't expect us to play 11 really, really difficult games in a season."