Why the fuck would your dumbass even trade for Diaw? He's been a running joke in this league since the beginning, and everyone laughed when he was picked in the draft. He put up fantastic numbers the first few games, when he was playing C without Thomas available. He's useless, and we all know it. You're just dumb enough to trade for him, and you gave up a fantastic PG and a C who will get 10/10 in a couple weeks for a worthless chucker in Diaw and a player with average production in Jamison. Dalembert hasn't been producing because he was signed literally the day before the season started. They're not going to throw him into a system that he doesn't know and give him 30 minutes immediately.
In other words, you fucked up. You could've gotten a lot more for Lawson himself.