The three demands of Zhengyi Sect were not excessive, but for the powerful Heaven and Earth Mystical Door, two of Zhengyi Sect's three demands were excessive.
Because once Zhengyi Sect was merged, resource allocation and such would be dictated by Heaven and Earth Mystical Door. Ideas like resource inclination or setting up branch locations were out of the question. That's why Conor Hopkins, the leader of the sect, rebuked Elder Ye on the spot, "Since Zhengyi Sect wishes to join our Heaven and Earth Mystical Door, then everything must be handled according to the rules of Heaven and Earth Mystical Door."