Newcastle United lost for only the second time in the Premier League this season on Saturday. Defeat to a Brighton side who have been in brilliant form this season is nothing to be ashamed about of course but the manner of the loss was hugely disappointing. Indeed, while the away side certainly improved after the break, Brighton did look there for the taking. Newcastle dominated for much of the opening period and could not find a way through, squandering a number of presentable chances. Alexander Isak was far from his best, though he was not alone in that. It could, however, have been differen…