Krstic and Nachbar are of course gone, both signing in Russia.
Yeah, they're going to be lousy, alright. 20 games sounds like a fair estimate. 30, tops, and that would be a minor miracle, as outside of maybe Harris, they don't have a lot of leaders on that team. VC, Simmons, and Swift are all prone to lack of focus / effort, and Sean Williams has certain issues of his own.
The only players on that team I'd want in Boston are Harris, Boone, and the rookies. Otherwise, ugh.