That would be very interesting. especially given the theory about his cognitive presence. I wonder, then, how his abilities due to the bond would relate to surgebinding. I Saw this topic in the cosmere theories.
This quote stood out to me, because like seons, Nightblood is not from Roshar. So if he could give Szeth the ability to draw in stromlight (among other things), would then all the stormlight Szeth draws in go right back into wielding Nightblood? I assume it would take a vast amount considering the thread about stormlight's ratio to breath. And in this capacity, his bond would act identical to that of an honorblade in that it grants abilities but requires an absurd amount of stromlight to use.