I think we now know why Williams chose not to put these on the album. Falcon Flight always seemed to be a little too different from the Williams sound and it seems that Haab's music laid the foundation for it.
There's also similarities with Solo. Battlefront II was seemingly composed first. Haab said he was surprised when he saw Solo in the theater because of this.
It's always bothered me the way in which they temped the sequel films. For the original six films, they of course primarily used classical music accompanied sometimes by music from other films.
For the sequel trilogy on the other hand, as confirmed by Rian Johnson himself, about 95% of the temp music they used was John's, and mostly consisted of his Star Wars music specifically. Basically he had to keep rewriting music over and over again that he had already written years ago, withou