So, I started up the gameplay video, and what's one of the first things I notice? The Countdown timer. Yeah, I'm not really a huge fan of this idea. Granted, I don't know much about it, but I do know that I hate speed running RPGs. I want to take my time, talk to every NPC, get to know everyone in the world. I like to do sidequests and enjoy the immersive world. Having a timer constantly ticking giving me the time until game over is not how to endear a game to me.
What's more, I simply cringe when I think of how many ways they could take this further and make it worse. Different side missions only available at certain times, things being lost forever just because you're too slow.
Countdowns can have potential for theming, atmosphere, and even story. But there's a reason why you could always turn time back in Majora's Mask.