The effort is likely mostly made in an attempt to appease those who miss that aspect of Epcot the most.
But, almost every more recent ride has some sort of mission implied.
This is so utterly absurd. So its not the DESIGNERS fault that the story for the ride is contradictory, unclear, uninteresting, and largely extraneous - the real fault lies with those ungrateful guests who think it worthy of note that Disney destroyed the unifying theme of EPCOT along with many great attractions.
Again, a theme park ride sets out the degree to which it is story-dependent. The Incredible Hulk coaster doesn't emphasize its story at all, so any criticism of the story is a minor element of evaluating the ride itself. In contrast, GotG absolutely emphasizes its story, with several long screen-based pre-shows laying it out at considerable length. The fact that that story isn't very good is very relevant. The story looms even larger because, in the case of GotG, Vekoma provided the coaster and various 70s and 80s artists provided the soundtrack. What Disney provided was the story and the method in which it is told.
By the way, Spider-Man has a near perfectly executed theme park comic ride storyline, no matter what contortion Disney boosters might make to try and paint it as being as ill-conceived as CR. In fact, the story in GotG M:B is also very, very well done.
If boosters don't want to be accused of shutting down conversations, they should probably stop saying things like "I'm so tired of criticism," or "why can't you just enjoy it," or "if you criticize any aspect of Disney you hate fun," or "those critics won't shut up." Another cute tactic is suggesting any criticism emanates from a few posters whose opinions should be dismissed. Maybe I've missed it - where are comments from grumps saying "all the positive comments come from a few biased idiots," or "I am so tired of people complimenting Disney?"
I use the terms "boosters" and "grumps" in an attempt to be even-handed. I picked a loaded, negative term for the group of which I am a part and a more neutral term for the posters I often disagree with. If that's unacceptable, however, I can pick other words.