If the Sox are getting Cassie, Young and Celestin they are not getting additional pieces from the Cubs. I also doubt they get that much.
I think more realistic would be Cubs get Crochett, White Sox get Young and Celestin plus a lower level guy from the Cubs. Seattle gets Hoerner and maybe Triantos or someone lower than him on the prospect list of the Cubs. The damage would be the Sox lose Crochett, the Mariners lose Young and Celestin and the Cubs lose Hoerner, Triantos and a lowered lever young prospect.