Chapter 1 is different. The first 5 decisions in Chapter 1 are always the same, but after that it's random, but they stop showing up once you start taking too long in that Chapter.
I really don't think your idea is going to happen. The game is set up this way for a reason, to integrate the phases so that each one slowly builds on the previous ones. It will not be the same if you were to just throw 20 decisions and consequences on top on one turn.
If you just want the decisions over with, just click through the dialogue as soon as you can. If you actually want to listen to the dialogue, then I don't understand what your problem with one decision at a time is.
