I would love more Paldean forms. As it stands, there’s only four families that are associated with them, and two of them are just “convergent evolutions”. Paradox Pokémon are also other forms, but they’re straying further and further away from the originals. Iron Valiant, Iron Treads, and the two concept sketches of the Muskideers and Gerbels being prime examples.
What I’d REALLY like to see is Pokémon specific items making a return. Tinkaton being my goto candidate. Why no 5% hold item that relates to her family’s hammers? It could boost those physical attacks a little bit, or maybe give her a Magic Hammer that doubles the strength of special moves, she’s got Marowak’s issues as it stands. Why not both? Chansey has 4 items associated with her family. Or Hypno; how after all these years does Hypno not get a Pendulum item? It could raise the accuracy of status moves by 50%, or maybe give it an Unaware-like ability to aid its wickedness. It gets Swagger AND Psych Up, and has access to Foul Play. Should be a no brainer, especially since they cut so much of its move pool between VIII and IX. In fact, bring back more of the wild held items. Not sure GF cut so much stuff in these games…