I don't care what people say, the finale was near perfection.

They hit all the right points that the manga couldn't even convey, especially the fact they used both One Small Step AND Good Morning World. The two most beautiful songs in the series, in my opinion. That, and they didn't show us every single thing that happens in the future, but by showing Byakuya's voice in the very end, we can guess that the time machine worked in the future. I'm assuming that's what they were hinting at at least. Above all of that though, I think they gave all of the main characters a very proper, very elegant, very bad, very exciting ending. Can't wait to watch the whole series again in a month or so lol.