In regards to cut content, I think its important to distinguish between what was intended to make the final cut but simply did not, and what was simply cut and therefore not intended.
For example the cut content featuring Traya arriving on Malachor and choking out Sion was very likely intended, as it doesn't contradict but rather supports in-game events.
On the other hand I still have my doubts on Traya telekinetically dominating the Council, its not as if that event was cut from the game, it's there, it just happens in different and frankly far smoother manner.
I also struggle to believe that Traya could dominate all three JC members at once, and yet be unable to overpower Meetra on a nexus. Despite two out of three of those JC members being capable of stunning and incapacitating the Exile themselves.
Which leads me to believe it was not intended.