Yes, knowing how to craft and ender eye is great. Knowing that it exists is fairly important, and similar to other items, lots of guessing or looking up online how to craft an item isn't any fun at all.

However, the advancement "follow an ender eye" seems to remove the discovery aspect of figuring out what it does. Wouldn't it be better for the player to figure out that the eye always seems to travel in a certain direction? I think the advancement should be changed to "Craft an ender eye" that would be achieved when the player crafts the item. The fact you can see the "enter the end" advancement after it should give major incentive and excitement to figure out what the ender eye does.

Im playing minecraft for more than 4 years, and it's clearly my favourite game, i love its gameplay, i love its music. Everything in this game is amazing. When i first heard of this game back in 2010, i thought i won't really like it.. i was wrong. When my friend bought me a copy, i wasn't really excited, but.. i loved this game.. When i was mad, music made me calm, because it's amazing. I heard a lot of music in my life, but i always enjoyed music which was made by C418 only, because his music like… has something special in it. Atleast The End soundtrack, when you listen to it, you just can hear how many love was put in it, every second of The End soundtrack fits perfectly to it, when you're listening to it, you just have a feeling how amazing is it. Developers of minecraft are the best developers i seen, like seriously. Maybe there are better developers than them, but not for me. They're kind, hillarious.. and just amazing. They are always checking reddit, pmc and other sites like that, just to check.. what community of their game made, because They DO care. They want to see, what people are creating, and i really, really love Them. Everything in this game, is made with love. It's really amazing, how a little game, became a new art form.. Where you literally can make anything. you. want. Thank you Mojang, for this masterpiece. Huge thank you.

P.S Im really sorry if my grammar is terrible. Im Russian, and english is not my national language. Maybe, someone will read this, and even if he'll hate how bad my grammar is.. maybe he'll be happy. Because game he's playing, is something more, than just a game. Thank you Mojang.