and I want to add to this, because I can't edit.
Sbisa is physical, and can fight. People have been complaining about having not having a tough physical bottom six guy, who can fight, and be physical so the top guys don't have to.
I'm obviously bias cause i really liked what i saw from him in 08, there's def more tools to him, than Del Zotto, but he just needs to be put on a consistent role, and figure things out. Physical defenders take longer to develop. Del Zotto sucks, because he was given opportunity and opportunity to show off his potential, but it never developed. Sbisa, needs that opportunity cause there's another guy named Bieksa, who has been crap his whole career, but has molded into a leadership guy because he has "heart", he's willing, and luckily paired with top notch defensive defenders all year.
Del Zotto on the other hand is slow, weak, the only thing he'd be good for is on the PP, and the team already has a guy like that, in Yannick Weber. Neither will account to anything anyways. Not, with their skillset.