Newcastle United were thrashed at Arsenal on Saturday night. Eddie Howe’s side did not even manage a shot in the first-half as Arsenal ran rampant. Truth be told, the 4-1 scoreline actually flattered Newcastle. Joe Willock’s goal upon his return from injury was clearly a positive but, aside from that, there was precious little to shout about. Indeed, what was so disappointing were the defensive mistakes. Howe even took the decision to drop the out-of-form Dan Burn from the starting lineup, turning to Tino Livramento as had been called for from supporters. Still, that change proved rather point…