The likeness of Johnny Depp isn't actually very good. It's a pretty decent Jack Sparrow, but Jack Sparrow is easier to achieve than just a regular every day Johnny Depp. If they just made an AA of him the actor sitting at home, then it wouldn't look much like him. We see a good Jack Sparrow because of the wig and facial hair and all of that. We're not looking at Johnny Depp, we're looking at a character.
With Walt, we're looking at what is meant to be just the guy. And honestly, it's as close to just the guy as an AA was ever going to get. People have been talking in here about the Biden AA and second Trump AA, but those aren't really any closer to their subject than this. They're suggestive, just as this one is suggestive.
As far as AA tech has come, it just is not currently possible to make a figure that really and truly looks like the real individual it's depicting. Especially when it's a contemporary figure that people have a pretty firm grasp on the appearance of.
This is without a doubt one of if not the most complex AAs the company has ever built. It's movement profile and abilities are genuinely impressive. That is ultimately what the selling point here is. Visually, it's the same as all of their other figures of real folks: it suggests the person.
Because that is all we're currently capable of doing. It's not Disney's artistry being off, it's just a limitation of the tech and resources as things stand today. Which is why I think if they were so dead set on this, they should've waited for the 80th or something.