So, I was wondering, we know that there were 10 orders of Knights Radiant, every with a corresponding Spren. It seems like those Spren have quite high statuses in their society, but would it be possible to bind another, lower Spren? And would it require some new, specific oaths? More specifically (as you can probably deduct from the title of this post), I was wondering if binding a voidspren would require saying any oaths, and if a Spren can bind to a human contrary to human's will. We know that KR denounced voidbinding so supposedly a human could do this, and Renarin, with his visions of future, might have accidentally (or purposefully, was he envious of Adolin's skill?) bound one. Given that voidspren don't fit the Honor->Cultivation scale, how could other Shard-made spren look like/act? What could be the Oaths for voidspren?
Other thing is, the Spren of Knights Radiant represent ideas that are strong in minds of people of Roshar: honor, truth(and lies), and Stormfather are the things that take significant place in the society. Would it be possible to elevate Spren by changing peoples' minds? Create a society that values creation over all and suddenly creationspren can become sentient?