This is, by far, my biggest fear. That there are only like 8 companions in the final game.
When you combine this with the idea that the companions might not change interactions based on party composition (like in DOS2, negating the "different combinations means different parties" route) and that much of the interactivity of the story in DOS2 was based around companions/origins, and given how you might be "forced" to play an Origin character for full content, and the limitation to four characters per party, it really seems like the party portion of this party-based RPG is just made for two playthroughs. As with DOS2. Along with basically two ways to play the game. Now, that's hardly a crime, but it's not very dynamic.
Remember the human (This is a forum for a video game):
