So haven't slept a wink all night cause I couldn't stop playing the game, finally finished it. Not sure what to think of the ending. I do like the lead up and the true Aghanim and true Demise fights. I rarely shield blocked or used potions in the game also never died at all in the game but the two fights made me use nearly all of my potions and shield block like crazy. Still didn't die though.
Like the character designs too, Demise looks like a suped up Akuma, haha. Aghanim's real identity being that of sword spirit like Fi was cool, and kind of made the final boss fight with Demise feel like a mirror fight.
As for the actual ending, I like the whole idea that Demise has cursed Link and Zelda and in the future, Ganondorf, putting them into this cycle that is, The Legend of Zelda. I don't really care for all the forced emotional crap with Impa, we never get to see Zelda and her interact so I don't feel anything for her fate. Though seeing present Impa die was kind of sad.
Fi's ending was bad. Fi was an all around bad character mostly because the writers never really gave her an arc to go through. She says she's learned so much in this journey but we don't see that, we never hear her opinions on anything (except for that one time where she tells Link to suck it up for calling Scrapper to get the basin) or see her question anything or go through the standard "robot/A.I. learns to be human" trope that happens in so much media. So when the game tries so hard to make you feel sad about her sleeping eternally in the Master Sword (why exactly?) it all feels hollow.
Liked the credits showing Zelda's journey, and showing all of the areas again. Kind of wish they pulled a Kingdom Hearts and showed a "where are they now" clip for all the npcs you had to interact with.
So the scene after the credits...Okay people are showing up on the surface now, but they're bringing loftwings too, when they specifically say that they can't go below the cloud cover. Whatever, I'll let that pass. The scene with Zelda wanting to stay on the surface and protect the Triforce and then asking Link what he was going to do next, almost thought the game was going to give us something to choose to say. But no, it just cuts to their loftwings flying away. Just an odd way to end the scene.