The new leader of the University of North Carolina system has much more on her mind than who should be allowed to use which bathrooms on campus. “There’s a lot more at issue in higher education than this particular issue,” UNC President Margaret Spellings said last week during a visit to Washington. “I mean, come on.” Among those other topics, she said, are affordability, access and student success in a 17-campus system with nearly 225,000 students.