Title. I don’t see the point in only Beast Mastery being able to use them. Survival is focused on pets too. It does make sense that Marksman can not, but not Survival.
There’s already a thing that Survival is melee and can only have 1 active pet, so they’re different enough and less focused on pets. But I don’t see why they wouldn’t use exotic beasts.
Survival before it became a melee spec. Was focused on traps and the other SURVIVAL elements.
While pets did have their uses it is the Beast Masters that specialised in pets.
Blizzard have effectively nerfed the Lone Wolf aspect essentially forcing Marksman hunters into not abandoning the pet features entirely and just being a highly mobile ranged spec.
So keep the exotic pets for the Beast Master Hunters. Otherwise you might loos the spec functionality - feel - fantasy and gameplay.