Shane Duffy dropped Gary Breen like a bad habit by insisting his season long loan at Celtic will make him an even better player than he was in England’s top flight.Former Republic of Ireland defender Breen has come under fire for suggesting Duffy was putting his own international place in jeopardy by swapping Brighton for a dream stint with his boyhood heroes and was in danger of becoming sloppy coasting to easy wins in the Scottish Premiership.But, after getting off to a flying start, scoring