Jean was never portrayed as a messiah figure until she was killed off for 15 years and her fandom kinda lost the plot and Marvel ran with it tho. And you should go back and read Cable 2008 solo, Cable & XForce and Si Spurrier if you think Hope has no discernible personality. She was almost ruined during Second Coming and AvX I agree with that. But she was one of the best characters of the 2010's in those other books and her relationship to Cable is the best development he's had since his bromance with Deadpool in the early 00s. If being connected to the Phoenix makes her derivative then Wolverine is a Jean clone I guess.