Brian Kelly's special teams have almost always been a liability, and at best, less than mediocre outside of the kicking game.
I do give him credit for developing some good kickers and punters throughout the years (Brindza, Yoon, Doerer, etc) but the return games stunk at best, with his insistence on constantly playing punt safe.
To put it this way, there's no way Brian Mason has as good of year as he did in 2022 if Kelly were still in charge.
Brian Poilian's special teams were always at least decent under Charlie Weis.