Well personally i think our defence needs a lot of work on...we played Barnet...should have ripped them a new one but ended up with a 2-2 draw

...pretty dire if you ask me.
Yes, other than not fit players and, very few regulars, the dire Djourou at right back and the absymal Silvestre at left back, who god knows how made a whole bunch of terrible back passes and short passes to other defenders that were stupidly close to being intercepted and were all a problem.
But the reason they got chances, was they ran through our midfield like it wasn't there.
Just like our first team our reserve team used to be Randall as an offensive wanna be Fabregas, he played a much more holding role in reserves last year, and sucks at it. Frimpong who in that game played the more holding role, was terrible aswell. Randall made a couple really bad challenges, even more so for a preseason game.
Defensively we are MORE than fine. Eboue is a well above average right back, and he's back up, Gibbs is already a pretty decent back up to Clichy and he's getting better with huge potential. We now have 3 real centre backs with some incredibly dodgey further backup cover.
Defence wasn't the problem last season, even in those embarassing games it was Song who was missing for 2 of the 3 Chelsea goals. The Anelka one in particular, for no reason he was pressing Cech, in his own box, he's an idiot, the DM pressing their Keeper for no reason, Cech to Anelka, ANelka ran though this massive completely empty midfield Song shaped whole and bang, goal. It was also Song and Denilson stood watching 5 yards outside the box as 6 liverpool players lined up to score the winning goal inside the box. They weren't out run, they weren't beaten by pace, both players don't know they should be following the midfield runs into the box, they NEVER do it. WE'd have beaten Liverpool if either of them had an ounce of defensive ability.
Utd's defence is far from bad, they lost to Barca because the midfield provided no cover at all. There were few individual errors all season at Arsenal and Man U at the back, the few games their were huge issues were mostly overrun midfields(or Vidic being a bum).