I think he is trying to run his contract down too... just my opinion. If he doesn't leave and refuses to sign... i would honestly put him with the U23 for the entire season
You may be correct that to some extent he's willingly running his contract down as it would certainly negate any large fee we'd be demanding.
On the other hand, running down his contract has it's own sizeable pitfalls: will other clubs be willing to wait? Will they not look elsewhere?
Equally, Koeman has already shown that he's more than willing to play hard ball so that could have a detrimental affect on his career.
It's in both ours and his interest to get this situation sorted as soon as possible, be that he stays (and signs a new deal) or moves on to elsewhere.