until there is a problem filling openings with qualified applicants I don't imagine this will change much.
Even for Undergraduates BYU does very little to recruit, I had a daughter who was a National Merit Scholar and BYU had by far the least to offer by way of perks/scholarship. Many schools were offering what amounted to an full ride athletic scholarship because they need a certain number of NMS students to remain part of the program. Oklahoma, Boise St. and Nevada all offered her free tuition, books, room and board. Oklahoma even threw in a free laptop. BYU said they would give between $500-$1500 a semester off of tuition and they couldn't even tell us the exact amount because they said they had a finite amount of money for the program which would be divided evenly between however many NMS students enrolled.
Another Daughter with a 4.0 and a 32 ACT got one letter from BYU after she listed them as a school of interest when she took the ACT. That was it. Other schools, many of them Ivy League, inundated her with emails and brochures.
Why doesn't BYU do more? I guess because they don't have to. Why spend resources on something you don't need to do. With their thrifty ways I'm sure this is the primary explanation.