This is why we have Darko and not Christmas (yet).....this team is going to the playoffs. This is the LAST year barring some dramatic changes we can compete with the Thunders etc of the world. Last year for the Spurs too.
Let's say you get to a week before the playoffs and Chris Wilcox goes down like he did last year. God FORBID Wilcox AND Collins goes down.
What then? You will never say "Oh! But we have Kris Joseph!" You won't say anything like that. If Wilcox goes down you will be very happy that you have Jason Collins and Darko rather than scramble to traumatize Fab or Sully. You play a rookie like Sully out of position against Bynum and that's how injuries happen and we can't have an injury to Sully.
If you have Darko, even if Collins also went down, then with a little help from J Green, Kg, Sully, and Bass you can still have something resembling an NBA frontcourt rotation. With Christmas and Fab you don't. I highly doubt Fab, Christmas, and Joseph are going to get you anything or anywhere in the playoffs if we needed them.
Let's say Wilcox goes down but it's really only a two week injury and you juuuussttt need to get to the next round and it looks like a 5 game series just became a 7 game series and then guys will be tired in the next round.
You need a Darko there. Not a Christmas. Not a Haunukah. Not a Kwanza. Not a solstice. Not even a New Year.
There are tons of project wings in this league and all over the place. We can get another one. There won't be a rush to sign Christmas if we cut him.