SMU has been struggling to find a way back to national prominence for quite a while.(Perhaps they may want to consider the goal of becoming locally prominent in the AUS first.)
I'm not certain that bringing back Nill or employing another high profile coach would be the solution, at least in the short term.
They'd be well advised start by developing better connections with Halifax area minor/high school football and recruiting more aggressively in that area. That these kids are usually raw and need plenty of coaching is a challenge, but the long term rewards are obvious.