>>32379788- Open World: All the sections in the game are one and the same: You don't enter to "another dimension" each time you enter a building or a cave.
- Battles don't interrupt your overworld experience. Battles are no longer turn based and are fought in the overworld. Other variables like agressiveness of each Pokemon get more relevance. Squeeze this feature in battles against Legendaries.
- Give a lot of detail to both landscape and detail in how Pokemon interact with the environment. Flesh out the current Pokedex descriptions into something the player can witness firsthand. Make completing the Pokedex an experience instead of a pain.
- You can use every attack in the overworld.
- Borrow features from Breath of the Wild, like Fly (like OR/AS but well made) or Waterfall; and rethink traditional exploration features like Dive or Surf.
- Main story should not be very long and further details should be told both through aesthetics and through the curiosity of the player and not through cutscenes, a la Dark Souls. Give enough cliffhangers and plot holes for fanon reasons.
- Make main story speedrunnable in less than one hour, but depending on the percentage of completion the player wants, it can extend up to 50 hours of gameplay, effectively blurring the line between game and postgame.
- Return of companion Pokemon, like HG/SS.
- No new Pokemon. There are too many and integrating them all in the games gets increasingly difficult.
In other words, I would be happy with a Pokemon mod of Breath of the Wild.