Sunderland’s hunt for a new manager rumbles on and although the temptation is there to offer Liam Rosenior the role, there are several reasons why they should avoid the 39-year-old. It’s been three months since Sunderland sacked Michael Beale and the Black Cats are no closer to appointing a new manager. Will Still appeared to be their number one target but it’s now looking ‘increasingly unlikely’ they’ll appoint the 31-year-old. In what has been a deeply frustrating week for Sunderland, who have seen targets such as Still, Bo Svensson and Paul Heckingbottom potentially on their way to other cl…