Part of Lambert's predicament is his own doing I think. He's allowed three of the starters in last season's defence to go - Hutton on loan to Forest, Warnock on loan to Bolton, and Collins to West Ham. Even the keeper has changed, with Guzan taking over from Given. Some departures / absences were beyond his control - Cuellar had decided to leave for Sunderland as a free agent at the end of last season before Lambert took over (he hadn't played that much anyway), and Dunne, their leader at the back, has not played at all this season due to injuries.
Sure, the guys who have been let go or frozen out might not have been great shakes, and Villa's defence wasn't exactly stellar last season, but still, they were far from the worst defence as a unit then.
As far as I can tell from their lineups this season, Lambert's defence this season looks like this:
Three guys in their defence have started more than 15 league games so far:
> Brad Guzan - a backup keeper with limited games and was apparently he was let go and then re-signed,
> Ciaran Clark - a young holdover from last season who had played maybe 40% of the games in the past couple of seasons, and
> Matthew Lowton - brought in from Sheffield United (League One) in the summer.
After that, the most regular starting defender is Ron Vlaar, a summer transfer from Feyenoord, with 14 league starts (no subs).
That's a regular defence that comprises a backup keeper, a promoted squad player, a new player from League One and a new player who is also new to English football. The other defender is either another promoted squad player with limited games in the past seasons, or another new guy from a Championship side (Boro). In other words, a back five that's more often than not, playing together for the first time this season.
Surely, if he'd had more funds, he could've gone for better and more experienced defenders and that might have fixed some of the experience / coordination problems, but still, did he (or their technical director, if there's one) get too hasty in clearing out the senior players at the back?
And we still contrived to lose to them at Anfield. Fuck!