But on Ashyn it was Odium who had given power to the not yet herauts?
we know that Honor gave power to Nale and Only Nale
(Wat ch64 “Nale,” Tanavast said. “It is good to see you. Tell the others. Did I lie to you last time?” “No,” Nale said. “But the powers you gave me… they helped burn the world itself.” )
who seemed at war against the others and we know that a bondsmith (Ishar) had to guide them to Roshar, in the flashbacks of the creation of the oathpact Honor tells them that he will take back their surges and retuned them:
(Wat ch64 I will take back your Surges, then grant them a new, and together you will become a force that both protects Roshar and binds the enemy away from it.”)
everything leads to believe that Odium gave in Ishar on Ashyn the bondsmithing
may be the fact that Honor is installed first in roshar reserves him access to the surge of adhesion (or restricted it on Roshar)
or Odium fears that someone could simply use it against him after Ashyn Events