There's no question that athleticism is something that can be improved at BYU. It's actually quite impressive what they've done without a lot comparably over the years.
There is help on the way in future years. Erickson's an athlete... Trey Stewart. Wyatt Lowell is pretty athletic for a 6'10". Harward's not crazy athletic but enough where he'll throw down on guys. Hopefully BYU's last 3 open schollies can get a few more too for next year.