I would have preferred to have seen Benioff's first draft which was IMO a much better script than the later drafts, and the film we originally got. Maybe a "disaster" is slight hyperbole on my part...but I didn't really like the film at all. They tried to shoehorn too much stuff into the film (such as all the cameos), that took away from Logan's story.
I will say that Henry-Gregson Williams score was probably the best thing about the film...and the five minutes or so of Ryan Reynolds as Deadpool proper that we got. The leaked "Deadpool" script makes fun of this version and addressed it "Fourth wall" style.