Conversation so far:
What did Iran's The Assembly of Experts propose?
The Assembly of Experts proposed a leadership council to replace the position of a singular leader and the removal of requirement for a Supreme Leader candidate to be a Marja'.
What were these lists involving Ali Khamenei?
The idea of a leadership council was proposed by some members of Assembly of Experts. Various lists were proposed and Ali Khamenei was named in all of them.
Why was Ali Khamenei's name on all the lists?
Supporters of the council proposal believed that having a council would produce a higher degree of unity in society and more positive characteristics would be found in a council

Question: what kind of changes did he help on counsel?
Self-contained rewrite: what kind of changes did Ali Khamenei provide to help the counsel?