The only thing separating Koeman from the boring, old-school English managers is his nationality and pedigree as a player. Same emphasis on defending, same reliance on crossing and individual quality for goals, same lack of ideas when things go wrong. Maybe he wants to "pressĒ a little more without the ball but his approach to possession/attack is as sporadically effective as Allardyce's.
Southampton had a team with quality players that was built to put crosses into the box and feed off of long balls. Sort of like Moyes' Everton. It seems great when it works but there's a limit to how much a team can achieve that way (barring a sustained run of luck).
I'll freely admit that I was duped by Koeman's Southampton results and thought he had the potential to do more. Lesson learned.