>Really focused on the "core" base now. Base difficulty is upped beyond any Pokemon game so far, and there's a hard mode that can be accessed from the beginning. Less hand-holdy and expects player to find their way around the world.
>Overworld is expanded and actually looks like a full forest, cave, town, etc. instead of a small scale abstraction. Not necessarily open-world, but non-linear level design. Use of verticality in cave/ruin maps.
>Features from Let's Go like following Pokemon, mounts, and overworld wild Pokemon are included.
>80+ new Pokemon with at most 5 legendaries
>Full 3rd Person RPG perspective, with moveable camera.
>Some sort of "boss" type Pokemon, like Totems
>Regional forms for gen 2-7
>Minimal Kanto pandering
>Co-Op mode has way more double/triple battles rather than just tacking tacking on a second player like Let's Go.