I personally thought most of the design's aesthetics he had planned out for the final version were too minimalistic, but that's cause I couldn't see the actual pages in action. Ever since the leak, it would seem EVERYONE thought these were good ideas, cause I'm seeing them being incorporated here and elsewhere.
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Oh yeah, the thing about deadlines is that if you don't set them, people will start whining. And if you do set them, people will whine if you don't make them. When you do make them, people will whine about how unpolished it is, regardless of quality on deadline. Long story short, it's a paradox which I would have personally approached by never setting a deadline. I believe Arc felt it important to do so in order to stay "competitive" with FA, at least in a PR sense.