I don't know man, he didn't change all that much if you ask me. He also couldve taken the extra "few hours" to make something that actually looks different before releasing it if you ask me.
If Svbtle's design is that great and reaches any level of popularity, you'll see tons of mimics pop up, and Dustin's so-called vision won't happen anyways.
Still doesn't change how I feel about this. He could have opensourced the engine on itself, taking the design as well is a blatant ripoff.
Another thing is this: The goal is simple: when you see the Svbtle design, you should know that the content is guaranteed to be great.
By stealing the design, he is completely boycotting Dustin at making this vision of his come true.