That's like saying the iPhone was decent when it first came out, but they've had 8 generations to improve it. Then the iPhone 9 comes out and it's just a tad bit better than the original iPhone, and people saying the last one had 8 generations to improve.
Simply put, sequels should continually improve.
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Like what would you say if all of a sudden Microsoft Word didn't have half the options it does now but had a bunch of stuff people didn't ask for but they put it in emojis that work on Microsoft and Apple products in the name of "balance"?