I think there's zero chance Hubbard plays safety. There's a reason that there's probably only been 6 or 7 safeties over 6' 4" in college football over the last 5-8 years, and close to none in the pros (only ones I can think of are Pat Watkins, Robert Sands, (both out of the league) and George Illoka). The guy's athletic but he's not some uber-freak that could cover slot receivers or be a centerfield type free safety deep. He's a LB all the way and an intriguing one with that speed and length.
And speaking of Lee, if he's the best man for the job I'm all for it. I love when these unheralded 3-star recruits come in here and just surprise everyone by grabbing starting spots out of nowhere (Roby, Powell) early in their careers. Lee was mostly an afterthought. I'm excited to see him play.