This really shouldn't have been made public. Maybe Lancaster and Rowntree didn't go to the press themselves, but even if it were leaked by someone, they shouldn't have commented. Not as if Wales can talk though with some of the stuff Gatland has said in the past.
I'm not quite sure what they are complaining about. The Ken Owens incident was the main incident he got wrong, but these things happen unfortunately. It's unfortunate that it led directly to a try, if it hadn't it would have been passed by as just another one of those incidents that happens numerous times in a game.
When it comes to the scrum I honestly don't see what Walsh got wrong here. Youngs was being a bit of a fool throughout, bickering with Walsh, and got on the wrong side of him completely. In the incident where Walsh was asking him to move over, Youngs was completely at fault. You listen to what the ref tells you to do, not complain and do the opposite. Adam Jones had pointed out that the scrum wasn't lined up, and Walsh had asked England to move to where the mark was, as soon as they did, they quickly shuffled back across (a tactic used to try to apply more pressure to the tighthead), and Walsh spotted this. Hartley soon came on.
Before that, England were either pinged for simply collapsing when the pressure came on, standing up when the pressure came on, losing their binding, or delaying the put in. On a couple of occasions Youngs delayed the put-in, even though there was an opportunity to put it in. People who have complained about Wales pushing early have obviously glossed over the fact that every single team pushes before the ball is fed, the 'hit' encourages it in fact. On one occasion Moore tried to point out Adam Jones' binding on the arm, but soon said 'but at least there is a bind of some sorts', because Marler never tried to bind at all in the first place. Of course Marler is going to be penalised, because he was doing it 'more wrong' than Adam, and more obviously too.
In regards to the ruck offences (outside of Owens'), Walsh was pretty even. He was harsh on a couple of occasions to both sides. Nothing to complain about.