Now NO ONE acts their age. The adults all bicker, but so do the kids. The only overriding aspect of everyone is that they are all EXTREMELY petty. Huey, Dewey, Louie are dismissive of their uncle and great uncle until they realize they live exciting lives, the girl duck is a carbon copy of the conspiracy obsessed exposition-spouting character Sticks the Badger from Sonic Boom, Scrooge is constantly feeling sorry for himself and wanting to do dangerous things not to acquire wealth but to feel younger, his housekeeper is not helpful and surprisingly irked to be doing her job (I guess she wouldn't be a heroic character if she didn't hate work). Donald is generally his short-fuse and charming self but the show really seems to dislike him. He's basically reduced to a useful idiot in the schemes of heroes and villains, never told anything, constantly abused, overly protective, and has this weird subplot about deeply disliking Scrooge. I figured they were adventuring partners?
Even the villains are basically man-children. Glomgold in the original was like the darker version of Scrooge: an obsessed, maniacal and sometimes quite sinister foil. He was not inherently humorous and neither were his followers. Even the Beagle Boys might have been dumb but they were still intimidating enough to be a threat.
Glomgold now is a preening, cliche, incompetent character who is never believable as a menace.
The other weird thing is how fixated the kid characters are on defining themselves as separate from the adults because adults have no fun, no lives, and are barely human. Huey literally states how he's looking forward to inheriting Scrooge's artifacts because 'he's really old', they describe Donald as 'too boring to be an adventurer', and NEVER describe adulthood as anything other than advanced senility ('We napped, rubbed ointment on our joints...old people stuff!').