>>57651896It's so far been a significant remix of Hoenn, lots of overhauls to familiar areas and plenty of new original areas altogether. Hell, you start in fucking Pacifidlog and go to Sootopolis for your first gym.
There's plenty of changes to mechanics and type interactions that might be hit-or-miss for purists, like Fairy only being resistant to Dragon, Ice resisting Water, Normal STAB hitting harder than other STABs, or Dual-Super Effective only doing x3 damage rather than x4, the list goes on really.
There's plenty of fakemons I like so far, and the game is generous enough to encourage letting you train a wide variety of mons, as once you reach the next gym, EXP gains get boosted to let anyone behind catch up quicker to the current level cap in the event they're ideal for the gym.