Only branching quest is the first one. Rest is just linear. This is just sad.
Well it's not completely true...it's just it doesn't matter what you pick, heck not even paths really matter.
For replayability I guess they intended that you can play "FEW" missions from 2 different points of view, or have a 3 seconds difference down the line. Or kill this or not kill that.
And this because this game is heavily scripted as a movie, not a game. So it doesn't leave much room for player gameplay and choices effective in the short term or, HAHAAH, that actually impact a world that doesn't exist.
What i noticed it can really change was the ending, after the point of no return they did that, also because they fucked up so hard everywhere else, that they really had to get at least the endings right in functionality.