So why not sign up already?
He'll be getting a lot of stick in the dutch dressing room over the medal collection or lack of at the Euros. As much as he may have affinity for the club I bet he has his eyes on actually having something on the CV to show for it beyond the player of the year gong.
Because he genuinely might have wanted to concentrate on dragging Arsenal back into the top 4 without the distraction of negotiating the most important contract of his career?
Van der Vaart might be in as much danger of this ribbing that you talk of so I don't think that is really a factor. Yes he will want to win things and as I pointed out, by signing Podolski and having Wheelchair back, Van Persie may well think that they can win a few trophies in the next 3-4 years with those 2 on board plus whoever else is added to the squad and tbh I am inclined to feel the same. I think that with a couple of signings in the summer to go with Podolski, Arsenal will be big challengers for the title next season.