2016 - 17 Emery, Haws, Chatman, Calvert, Beo, Bartley, Toolson
If you count Hartsock as a big, that's 7 out of 15 that are guards. I'd say that's just about right. I'd also say that he's reacting to BYU's mix over the last 5 or 6 years, which certainly has been guard-heavy.