Well, I finally got to the end of the thread...
I'll give my thoughts on Steve.
Steve is a landmark character. Absolutely the biggest character with any shred of Nintendo prominence. This choice has appealed to millions upon millions of people and has made many kids in my class, very happy (well, the ones who know what Smash Bros is, most just know Minecraft). Nintendo shot for the stars and they succeeded. Objectively, I cannot stress how big of a move this is, and how well its going to pay off. Well done Nintendo, I can't imagine this was cheap, but I bet you're going to get your money's worth.
Personally, I don't have much of an attachment to Minecraft (haven't played it much, though this is a great excuse to go back and try it again), but Steve looks pretty cool. The moveset looks absolutely bonkers. I know some people don't like how out of place he looks, but I find that to be part of his charm. He's intentionally weird, but in a way that lets his own series shine. And frankly, Steve would look even weirder if he was "cleaned up" so to speak. It's like 3D Mr. Game & Watch. Unnatural. I imagine that many of the visual complaints will die down as people get used to him.
Overall, pretty great reveal. Not my favorite, but I still feel happy about it.
Also, that ****ing piano track was a ****ing banger! HYYYYYYYYYYYYYYPE!!!!!