I don't know about lucky. I could see him leaving, as he has had some big performances these last couple weeks. I think it might benefit him to stay and build off those games, but who could blame him if the scouts tell him he'll get drafted early.
I think Castille and Helu Jr. are going to be a pretty good duo, so although I would love to have Lucky back, I think we have some good depth at RB.
As for Ganz, everyone wants to second guess not starting him sooner. Oh well, what can you do. At least now we know we've got our QB for next year. Fear the Ganz. He seems flexible enough in his skill set that he could run another type of offense, like a spread option, if we change coaching staffs.