Wrong.
He's already really good (not great) but only 24.277. He could have another year or two of growth/experience.
I don't think he has some of the issues that some other uber-athletes have (like ONeil Cruz).
His K/W continues to improve, going from 4.11 to 3.16 to 2.70 to 2.43.
His EV and FB% took substantial jumps last year. I'm an agnostic on FB%, but I consider his 26.4% to be a prime number.
On this last one, it's above my pay grade, but he seems like a happy camper. I like guys that like to play, but the FO has to do the homework to see what he's like in the clubhouse.
He's not really replacing anyone. There might be guys in the clubhouse that everyone likes, and it's a negative to replace them. But no matter how good Arias might become, he isn't one of us yet. And no matter what one thinks of Story, no one will be upset replacing him with Elly.
What would put me over the top, however, is if he came with an extension. Again, it is homework time in the FO. Maybe he has some negatives I am unaware of. But he reminds me of Tatis. Setting aside the PEDs issue, he seems like a sinewy type of athlete that could give us ten years before the decline. If he passes the character test, give him $400M/10, plus the control years, pound down a few shots or puffs or whatever, hurl, and you just might wake up in the morning with a HOF-level 25 year old kid.