Err.. isn't the job usually of other players, like fullbacks and defensive midfielders, to cover while centre backs attack a corner? Can't blame them at all for not being back there.
Davies and Rooney both had opportunities to take Gray out and didn't. Rooney especially should have had the cop on because the counter had escalated by the time he waddled behind Gray.
Well usually I'd agree mate but usually in most cases your 2 central halves will bomb it back with time to spare and be back in position. Watch the goal again and they are blowing out their arse before they barely pass the halfway line.
As I mentioned last night, if your that unfit and can't recover in time the manager needs to be aware if that and tjebplayers need to pipe up a bit because it was bloody comical.
And all of the above is without the moments what you mention where 3 times it could have been stopped but can you remember the last time we won a 50/50, stopped a dangerous counter attack? Nope, me neither