No great loss.
Don't get me wrong, DdV is a good keeper, but he really isn't PL class. He can't save penalties, he flaps at corners/set pieces and doesn't command his players. When you have the likes of Rooney, Tevez, Bale running at you, you need a keeper that will ensure he has total control of his back four. He makes some fantastic saves, but that is against lesser players than he will face this year.
All in all, I am glad were not breaking our wage structure to keep him, he's done well for us, and I wish him the best. I do think he's making a big mistake but we'll move on and get a better keeper between the sticks.