I was really impressed by what I saw. It already looks a lot more fluid than HW. I love the new special actions like Link's bow. The runes look really cool, too. I love the combat gameplay we've seen and the weak point looks more consistent to me, as well. The visuals on the combat look very hype and I love the weak point smash animations. So cool.
The map is gorgeous. Like, wow. We knew it would be because BotW is gorgeous, but wow it's so cool. I loved seeing the Garrison and Tradepost ruins in their former glory. That made me a bit emotional. I also loved the music. I said in another thread I was hoping for some intense orchestration over intense rock, since that fits BotW better, and it looks like that's what we're getting. I'm happy about that.
My main concerns are consistency with BotW. Obviously it's really hard to call this game canon because of the towers popping up and the sheikah slate using runes, which 100% absolutely did not happen 100 years ago. That's not a bad thing, though; canon or not, this game looks amazing and the story it will tell will still be fantastic, just like with BotW.