Finally tried put the demo tonight. The atmosphere manages to recreate a sliver of that refreshing foreignness the Sheikah tech gave me in BotW for the first playthrough, which is awesome. However, I really don't like the BB8 guardian, I have some serious concerns about it being in this game. If this game ends up being about circumventing the outcome we all regard as canon, it'll really bother me as it would take a **** on the tragedies that befell all the champions. I want this game to characterize the champions and actually make them likeable to the point I'm gonna dread seeing them die. Cuz in BotW, I felt no true connection to them as characters. Sure, I like Revali for being an asshole and Urbosa for being a badass, but their writing was as bad as BotW's story presentation. The only thing that can redeem the time travelling guardian is if it's part of some scheme by the yiga, or it's going to prove relevant in BotW 2. Otherwise, it's stupid and unnecessary.
But the gameplay is clean and there's an option to mute voices, and overall I'm very impressed with the way they managed to hybridize BotW mechanics into Hyrule Warriors' already somewhat hybrid Zelda/Musou gameplay. Not too thrilled about how complicated the shoulder button mapping is, and bothered there's no way to remap things, but I think I can manage getting used to it. After an hour of pressing ZR to dodge and getting punished because that's not the dodge button, I'll eventually learn the right button to press.