Newcastle United’s season continues to be marred by inconsistency. Only days after Eddie Howe lamented how little his team have been able to show their elite capabilities following a big win over high-flying Aston Villa, Newcastle conceded four goals at home to Luton. While the manner of the comeback from two goals down was thrilling, it should not mask the defensive problems clearly impacting Newcastle this season. Already, they’ve conceded as many goals at home thus far than they did in the entirety of last season (14, via WhoScored). The last three teams to visit St James’ Park have all sco…