Can McGaughey add a spark to 49ers' return game?

Daily 49ers blog for NBC Bay Area website: In 2014, the 49ers' punt- and kickoff-return units were mostly ineffective. Can new special teams coordinator Thomas McGaughey Jr. change them for the better? http://www.nbcbayarea.com/news/sports/Niners-New-Special-Teams-Coach-Faces-Challenges-291399731.html