No, I am not. RVP is a world class striker who has been a starter in every club. Sir Alex made him his main player here, and actually relegated Welbeck even below Chicha in the picking order. On England, the moment Sturridge is available, Welbeck gets shifted on the wing. And I predict that the same will happen on Arsenal, who anyway weren't interested on him until the final day.
Danny Welbeck is Lucas Leiva of this forum. While Leiva became better every game he didn't play, Welbeck becomes better with every game he gives an average/mediocre performance. Reading some of the comments here (especially from you) the reader may be forgiven for thinking that Welbeck is the reincarnation of Pele, Fat Ronaldo and Henry all in one.
To suggest that we did a mistake for allowing him to leave, after he hasn't show anything more than what he did here (making a lot of pointless runs and losing a lot of chances) is extremely weird. If he was setting the world on fire, then I would have agreed, but so far it looks that selling him was a completely justified decision.
At-least now finally he doesn't have the excuse of being shifted 5 meters from the central striker position, and neither the team isn't creating a lot of chances. Fortunately, he is playing as the main striker and their team creates chance after chance for him. Unfortunately for Arsenal, he is justifying people who said that he isn't a great/very good striker and has serious problems with finishing. Now someone remind me that he once scored 6 goals in 9 games and ignore the other 135 games.