Yes
No
He probs is and would have made an improvement to this team no doubt, Like LDG if we lost cesc and Nasri and got him and a few other dud players not many fans would have been happy with that. At sunderland he plays under no pressure. Would he be that good here with more pressure on his shoulders.
VDV could have played as part of a central midfield 3, behind the centre forward or even as one of the wide players in a front three (although he's not as effective there). Our problem has been that our squad has been too weak, with insufficient quality in numbers. What would have been the problem of having an additional quality player to give us more options? And anyway, Wenger must have known Cesc would have left eventually in 2010 (when VDV signed) so he could have become Cesc's successor.
Just because you have a similar player doesn't mean you shouldn't be looking to add to the squad. I mean Spurs already had Modric, who is their Cesc, yet they still went and bought VDV. It's a squad game now, everyone gets their share of game time. Particuarly in our case because of injuries.