What?
How in the hell is an amiibo fixing a game?
Definitely One Thing?
I agree with your larger point, but your wording "one thing" implies that all TP was missing was an extra dungeon.
TP wasn't hurting for dungeons. It has the largest number of high-quality dungeons among all 3D Zeldas.
Where TP needs improvement is pacing. Especially the first hour the tutorial sections would really benefit from streamlining.
I would have thought that the bolding would have made the sarcasm obvious. Twilight Princess HD sans Wolf Link amiibo is still an improved version of a complete game. An extra dungeon is a big "so fucking what?"
This is the same as complaining about DLC existing. If you don't like it, don't buy it. Unless you plan on 100% doing absolutely every single thing possible in the game, then don't worry about it. You were going to skip parts of it anyway, so this will just be another part you don't play.