I've played both and it's apples to oranges, dry rotten oranges. In portal the story slowly builds up into the grand finale and the ending is indeed emotional knot to tie up the story with a bow.
In minecraft you have a a long preparing to do before frustrating boss fight followed by some scrolling text you likely won't be bothered to read and skip thinking "Well, that was a waste of time." (Not by a fault of the poem but by a fault of game design.) Minecraft is a great sandbox and world exploration game. I see why they wanted to add an "ending" (to make it clear it's out of beta, (releasing on time)) but the ending doesn't make much sense game-wise.
In minecraft you have a a long preparing to do before frustrating boss fight followed by some scrolling text you likely won't be bothered to read and skip thinking "Well, that was a waste of time." (Not by a fault of the poem but by a fault of game design.) Minecraft is a great sandbox and world exploration game. I see why they wanted to add an "ending" (to make it clear it's out of beta, (releasing on time)) but the ending doesn't make much sense game-wise.