Like this theory!
Thought about this too, and have a theory, what if Wind, Stone and Night are sprens of Adonalsium, as we know sprens was on Roshar before arriving of Shards, and Roshar was created by Adonalsium himself. Sounds crazy but there's few points about this:
1) Sprens created bonds with Radiants looking on Oathpact between Heralds and Honor, so we can use same analogy on creating sprens by Honor and Cultivation - they arrived on a planet, and finds ancient sprens created by Adonalsium, and decided to make something similar by himself.
2) We know that Night changed, and Wind started hiding - this could be consequences of Shattering, in analogy Stormfather changed after Tanavast death.
I think about this theory because it would allow Kaladin became Bondsmith and don't leave his bond with Syl, because in this case he will be like Hoid, having different types of investiture, one from Shard, and one from whole Adonalsium.
So maybe he will become Bondsmith with power, that was created with all 16 Intents. That also will explain why Hoid gave him lesson how to hear Wind.
What do you think about this theory?
P.S. I hope all this would be readble and don't look like gibberish of madman