@Azombioso two reasons they might not have changed the card. #1: unlike most of the cards that have been nerfed, it’s not FAST. For obvious reasons, having a card that always wins by turn 5 is worse than a card that always wins by turn 8. It’s also legendary, which makes it less visable than a lot of cards that received nerf.
And, most importantly #2: until recently, making Dragonfruit untrickable wasn’t an option, because untrickable wasn’t a thing.
There are other untrickable legends, sure. And there are other untrickable cards. So what? Dragonfruit also fills the Three-Headed Chomper niche and the Brainana niche (and it does both better than both of these). The problem is, it fills too many niches.