I also felt that there were too many battles. Sometimes, with my pace, it takes 1-2 days to clear out various caves (and I don't play very much). I think it was unnecessary to overload the game with so many mobs, because it gets boring, as I personally always defeated them with almost the same tactic, and it gets really repetitive.
By the way, overall, the game is quite good.
Where do we end up when we save the world?