It has been a difficult season for Newcastle United, there’s little getting away from that. Where Eddie Howe’s initial impact at St James’ Park was a thrilling pulling away from a relegation battle before leading Newcastle into the Champions League and a Carabao Cup final, things have stalled since. Indeed, there have been growing pains this time around. Despite the many millions PIF have at their disposal, FFP constraints have limited what the club have been able to do in the transfer market. That’s without even mentioning Sandro Tonali’s ban from football, fellow summer signing Harvey Barnes…