You supposed that they didn't have confidence him themselves. I'm wondering if they didn't have confidence in their receivers. And I'm not sure why or if this is even accurate - but it sure seemed like Romney targeted little bro a disproportionate amount of time - but that's maybe who he did have confidence in. (That said - Gunnar's leaping catch over the middle was a legit pass and catch.)
I've also wondered if Tuiaki's scheme is intended to cover some glaring weaknesses at BYU. At times I've wondered if they keep the 3 man front due to a lack of DL, and not wanting to wear out those they have. I've wondered if they have concerns about pass coverage, which leads to dropping more in coverage. I get not wanting to give up the big play and hoping another team can't execute down the entire field, but if you can't stop the run, at a certain point you have to take some risks.