Jacques

Why is it impossible to change pokemon immediately after an opponent's pokemon fainting ? I mean in the gameboy versions, the game used to say "dresser X is calling Y, do you want to change pokemon ?". Here you can change but it makes you lose an action. In my eyes it totally ruins strategy in battles. So I wonder if this was normal and made on purpose, or if it was a bug, a "work in progress" thing or something i missed thanks