Today I reread The Kitáb-i-Aqdas to readdress what it states, rather than people's opinions..
I agree with much of what was being stated in a Sufi mechanism of reading it; as it expounds on these ideas, and corrects many stringent Islamic rules.
The Oneness of Heaven in my understanding is that there are 24 aspects (Elohim) of the Source of reality (El); who interact with reality, as Source is beyond things.
Baha'u'llah recognizing himself as a Bodhisattva, I've got no problem with; same with anyone who dedicates themselves to that profound realization, and helps inspire others to do so.
In Heaven (Oneness) the Divine Council do not argue about who's book is best, as it is about who can do more to serve others.
I believe the Baha'i tests allocate for God to send someone to fix the message if it became corrupted (37), and God literally sent me to fix the Great Deception, before the Great Tribulation
Where Baha'u'llah said someone with the name of the city would come (84), where I believe we can exegetically show that is me by definition; especially with the wisdom God sent me with.
I'd say we can show many of the Avatars are on the same page (Oneness - True Faith); it is some of the other misconceptions made up by men, where it then becomes problematic - As some people are more inclined to follow the doctrine from the scholars, and thus often missing out on the Oneness from the Messengers.
In my opinion.