Adelman is blaming a lack of focus on defense. So are the players. So are many of the fans. What we have not seen yet is any additional effort to correct the poor defense or any better rebounding.
Along with turnovers, the Kings are more then a bit generous regarding the hopes of the teams they are playing. Adelman thinks the offense is fine, and from what I have seen, the players certainly are still getting plenty of open looks at the basket even with Webber, so that is not going to be a huge problem once they start to hit the shots regularly once again.
On defense and the prevention of second chance points, however, the Kings as a team are horrible yet. How much blame should go on Webber's sagging shoulders is becoming less of a concern each game as the whole team contributes to the lack of effort.
So far, just talking about it seems to have had no effect on the players actually doing anything about it, though.