When people say, "It's short!" No one is arguing it's not short.
When people say, "But it's *too* short!" No one is arguing it should stay as short as it is or be even shorter.
When people say, "It's a clone!" No one is arguing it's not a clone.
When people say, "It's redundant to Space Mountain!" No one is saying that there aren't two sci-fi coasters next to each other.
When people say, "But, ugh, that big box!" No one is saying they like the box.
When a particular person is obsessed with the idea that the ride doesn't carry through visual elements of the TRON movies... well that's a matter of objective reality that can be argued with.
So, what 'legitimate' gripes have people been getting push back on?