Well now that things have calmed down...
Disclaimer: I'm not disappointed by the result, it would have taken a magical performance from the side to win that, saying that we still didn't play to anywhere near our capable level, that is disappointing.
Players:
Edwin Van De Saar: Not a good game to finish on really, made a couple of good saves but he could have done much better with 2 of the goals and his ditribution was poor.
Patrice Evra: Not too bad, don't remember him making many mistakes, hard to exert influence against Dani Alves
Nemanja Vidic: Superb, made some absolutely brilliant challenges, not sure if him or Fabio were at fault for the first goal though
Rio Ferdinand: Did well but tbh was a spectator for large periods, more on that later
Fabio: Didn't do too badly, a couple of good challenges and seemed to support the attack better than Evra the few times we managed to get forward
Micheal Carrick: Started well, made some good challenges and was probably our best passer, tired as the game progressed.
Ryan Giggs: Really poor, wasn't closing down enough and didn't exert control when on the ball
Antonio Valencia: Absolutely appalling, was very lucky not to walk, I counted a good 6 fouls from him, fortunately for him the ref gave him 3 or 4 before booking him. In attack he was as effective as a wet fish, he managed one cross the entire match and it was about 10 ft long.
Ji Sung Park: Not too bad, not as good as he was against Chelsea though. He closed down well and did very well against Messi in the first half, on the ball his control was frustrating.
Wayne Rooney: Had a great game considering, was always productive on the ball and scored a great goal.
Javier Hernandez: Not even poor, he just wasn't involved in the match at all. It was a mistake to start him and it was utter incompetence not to take him off.
Tactics:
Fergie claimed he would learn from 2 years ago, he really didn't. We didn't set ourselves up to play our game or to counter theres, we did a half way job and it wasn't good enough. We were 10v11 for most of the match because Hernandez wasn't involved, would have been much better to have an extra midfielder.
We also weren't pressing them at all, all our midfielders were standing off Xavi and Iniesta, even in the first half, why allow him that much time??
Messi was never marked, he should have had someone on him, I lost count of how many times he was given the ball without a United player within 6m of him.
Fergie's subs were absolutely baffling. He left good players behind to overload the bench with midfielders.....then didn't use them

After 50-60 mins Giggs, Carrick and Park were tiring, why didn't he bring on Fletcher and Anderson for some fresh legs? It was just stupid really, against a team like Barca where you are chasing the game you need to use your subs and Fergie just didn't. Nani should have come on earlier when it was clear how **** Valencia was playing, he did more in the first 5 mins and linked up well with Rooney. Scholes was just a weird sub, Anderson has been playing ten times better lately but was ignored completely.
I mentioned in the transfer thread that Fergie's bias towards players is coming across more and more. Giggs was appalling tonight but he still wouldn't sub him, he brought on Scholes despite there being far better options available. Nani is one of our most talented players but was brought in far too late. He wouldn't take off Hernandez even though he must have touched the ball about 5 times over the entire match, why bring along Owen if you don't have the faith in him to give him a go?
And the most damning evidence of his bias was dropping Berbatov, if Owen wasn't going to be brought on then why leave behind our only other striker? Say what you want about scoring form, his experience, ability to hold up the ball and skill would have given us more possession than Hernandez's just running around offside doing nothing.