Over Roscoe's first four seasons, he averaged 14 yards per return (1,312 on 94 punts), which is certainly the best in the past 30 years.
Last year was a train wreck for everyone and I think being in DJ's dog house certainly affected Roscoe's confidence on letting balls go over his head. If he's feeling more involved under Gailey, I'm hopeful we'll see more from his return game as well.
BTW, Hester's averaged only 6.9 yards per PR the last two seasons, with no TDs...