In my humble opinion this story of "The game has a little/no plot progression" is a little bit strange. The plot is progressing in a similar way to "The good, the bad and the ugly", in which Sergio Leone spent the entire two hours of the movie (which is three hours long) to introduce the characters, the setting, the quest for the buried money and then he spent the last hour to solve the plot. I suppose in this game we will see something similar, in which the first (six/seven?) chapters will be used to introduce all the elements of the setting and the last four/three to see the ending.
Is it a slow development? Yes.
It is a bad development? No.
Is it a slow development? Yes.
It is a bad development? No.