subdivision of mob spawn toggle

Recently mob spawn (including passive mobs) has been turned off, it's normal but the problem is:

-when you want to make a farm, you have to make sure that not only the ground light level AND the underground/cave's light level is above the hostile mobs' spawn level.

- when you want to make a landscape with mobs, you need to make sure that no hostile mobs are spawning because they are gonna attack you or passive mobs. (I'm talking about bees in this case, when bees come out of the nest you need to make sure that mob spawn is toggled on otherwise they will disappear, so are turtles but turtles don't go back to eggs and come out of it)

Can we add/modify commands so we can toggle passive/neutral mobs and hostile mobs?
Or just enable passive/neutral mob's spawn on?

 

Imagine a creeper spawned behind you and boomed you and your turtle/dog/cow...