Offense is a problem at times for this team. It certainly is when the bench is needed. Now, defense is a bigger problem, but still. Besides, Pau's issue isn't that he feels he would be more effective in the starting lineup. He just feels like he deserves to be in the starting lineup. His resistance isn't due to a concern for the well being of the team, but rather, for his own ego.
Offense hasn't been an issue since Nash came back and the rust came off. It'll only improve as they play more together.
Like I said, I think his complaining came from his disrespect of the coach. I used Phil as an example. Pau wouldn't complain if the team was coached by somebody competent. It's only for the greater good if his benching actually helps the team win, which I don't think it would since he is still being used improperly.
I am giving Pau the benefit of doubts here because of what he's done in his career and for the team. Pringles is the ego maniac here. Even that idiot Jim Buss publicly calls for more touches for Pau on the block.
I also don't believe Pau has declined as rapidly as it may seem.