Can't handle it at BYU. Tafua and Bernard are just the latest examples of even return missionaries who just aren't BYU fits.
BUT, BYU can and should identify really talented athletes who are BYU fits and have that DE body type. Convert them early and teach them the position. BYU excels in recruiting TEs and it is basically the same type of athlete.
Could Pilimai, Wheat or Rex play DE? What about Wilgar, Funa or Bywater? Get some speed guys with length and test them for DE types of agility and aptitude.