That derozen contract is awful awful awful (and Hollinger has been railing that one too), but a bad team signing a bad contract (same team that overpaid for fields) shouldn't really make us feel better about overpaying for Green.
Holiday had a disappointing year last year that was still better than either all of Green's years or all but one of green's years, and is very young for his draft class. He is also very valuable on defense and a good shooter, so he'll stick.
Taj Gibson is a great defensive PF and decent on offense, so I think his contract will be fine value.
Lawson's and Curry's were a bit steep for different reasons (will lawson maintain his high level projection/can curry actually stay healthy), but we'll see on those; both have far more potential than Green.