According to Jake Fischer, the offers weren't nailed down, but along the lines of Hawks: Gallinari, filler, and a pick; Mavs: Powell, Kleber, filler, future pick, etc. What seemed clear is that Hawks weren't offering any of Collins, Bogdanovic, Huerter, or Hunter. And from what Fischer could tell, Brunson and Finney-Smith were off the table for the Mavs, not sure about Hardaway.
Needless to say, I left that conversation feeling much better about the NOP offer. We can all certainly agree that CJ is worth more than we got, but I think it is reasonably likely that we got as much as we could have given the market. And FWIW, I am also in the camp that CJ's value a couple of years ago really wasn't much higher.