It was pretty good.
What I liked:
1) The new gameplay changes look really cool. I was glad to see some in the trailer without having to listen to someone narrate over all of them.
2) Actually fighting alongside characters like Sidon. It felt weird to me that Sidon and the others were supposedly warriors, but never participated in combat in any meaningful way, either acting as transport of literal cannonballs.
3) The general look of the trailer. A lot of the shots seem unlike stuff we've seen in the franchise before. As much as I detest Zelda being thrown in the closet once again, the shot where she's falling and Link is reaching out to her looks good.
Some stuff I didn't like:
1) Zelda is being thrown in the closet again. While it's just to be expected at this point, some small part of me still secretly hoped that Zelda would play a more significant role in this game. Given how few scenes she shares with Link and how there's no indication she will accompany him, it looks like she's condemned to background status once again.
2) Ganon. The man looks cool, but nothing else about him impressed me in this trailer. He was given the most generic villain lines possible and the dialogue alone seems to drag down the quality of the voice acting. He feels generic. Evil boy doing evil things, because no thoughts head empty touch Triforce.
3) The story. Like previous trailers, this trailer was very hesitant to provide any real story details outside of floating castle and Ganon coming back. I've expressed it many times, but that makes me nervous. A sequel like this being so unwilling to provide any real story details in the weeks leading up to release indicate to me that the story probably won't be much. I suspect we'll see TotK's history as an expansion pack on full display.