Noppadet

With the importance on rocks being emphasized (Urithiru looking like it's "carved out of rock", the holiness of rock to Szeth's people, rock markings being pointed out and being a chapter name), and the fact that stormlight grows plants (WoB), I'm wondering if we won't see rock somehow allow Radiants to draw in Stormlight. As someone mentioned it makes no sense for Radiants to draw from chips and broams, and it's unlikely they would need to fight solely around the Highstorm, so I'm thinking that maybe they can draw from either Roshar itself with rocks as a conduit, or similar. Something is definitely important with rocks. Also the new surgeon apprentice was intentionally left a secret; I'm guessing it will be someone that Kaladin will know or will think strongly about.