The road to hell is paved with Hasbro's good intentions...
Star Wars collectors are faced with these same issues, and are not looking forward to the prospect of having an enclosed box with no potential to choose between the sloppy paint apps and switched out figures either.
While Hasbro is trying to do something they view as good, and maybe the overall net effect on the planet may be a positive one, (the jury is still out on that), Hasbro forgets that when paper breaks down in an confined space, (like a dump, or in a trash bag), and can't breathe, it emits harmful chemicals as it breaks down, and gases that damages our ecosystem. So if the cardboard isn't recycled what the collectors are throwing away will be harmful to the environment as well. Not to mention the increased demand on the worlds lumbar supply which is growing steadily year after year.
Where both substances are able to be recycled, to me it would make more sense if Hasbro did away with frivolous lines that didn't sell - THAT would save the most plastic.