I feel like it’s mostly because the newer art style gave everybody a slimmer and more narrow face like you’d see in a typical anime boys rather than a real person. In the older style, adachi and most of the cast had a more defined jaw line and distinctive face shape so they just naturally looked a little more like average people who were in their 20s-30s.
Now that this element has kinda been lost with the new style I think everybody just looks a little more young and basic. I honestly don’t hate this new style either but I definitely think it lacks a certain mature and adult charm the og had(〜 ̄△ ̄)〜

The art style lowkey changed n im a little conflicted. My 30 year old king Adachi looks twinkified in these new chaps