I don't really think it's fair to call them 1 dimensional caricatures. Sure, they'll never reach the writing highs of the original game, but frankly, they don't need to. Persona 3/4 were life sims, whereas PQ is a whimsical adventure. There's an inherent conflict of interests in terms of writing from the get go. Instead of trying to capture their original characterization, (like the arena games failed to do) PQ does its own thing, and it does it well. So while they don't strictly act like how they do in P3/P4 (due to the fact that those were life sims) they're fairly well characterized in PQ. With the exception of Akihiko, Chie and Teddie pretty much every on both sides are well preserved or tweaked to support the stting. In certain cases, such as Yukiko, Mitsuru and Naoto (definitely Naoto), their characters are straight up improved.
Akihiko and Teddie are pretty irredeemable though.