And I mean as summoner, not Free Company.
If im not mistaken, the lore for the primals states that they are actually "good" but have been corrupted in some way or another.

Perhaps the summoner quests will make you somehow cleanse the primals or separate their "good" part from their corrupted part, and then allow you to summon that small and weakened part (or as some have said, maybe putting it into some other vessel, like wind carby or some such)

Thoughts?