I've not really spoke about anything involving the Region, rather just the Pokémon. So things I'd like (Probably already been spoken about, but I haven't been following this thread!)
- Overall large region
- Safari Zone return: Having a brand new extensive Safari Zone.
- Less "straightforward" directions, have the region much more spaced out with longer, more complicated routes
- The banishment of the "trees" you're able to cut; change them to normal/dead/thorn bushes, something thats more realistic than a small tree in the way.#
- Secret Bases return - Bit of RS nostalgia
- More importance to the "underground" - Possibly areas which you travel underground, and underground town?
- Islands, opposed to one big land, although still have quite a large mainland.
- Overall more complicated to navigate; have gyms in different places instead of a gym as you go along. Although maybe a posibility of making gyms random to visit, with levels changing depending on how many gyms you have participated in already
- How about some mazes? Puzzles? Make routes overall more enjoyable