It was not the most productive of transfer windows for Newcastle United. Indeed, their summer window was in fact so underwhelming that club legend Alan Shearer even suggested owners PIF had “failed” manager Eddie Howe. Quite what the Newcastle United boss can do with a squad not significantly strengthened remains to be seen, albeit it does remain one of the most expensive collection of players in the world. The fallout from the transfer window has continued, too. Sporting director Paul Mitchell is said to have upset people with his claim that the club’s existing structure was not fit for purpo…