You may be right, but I would hesitate to draw that conclusion. The game throws in a lot of stats for Myriam, not all of them are going anywhere. There's an old discussion some hundreds of pages back where the dev explains that the existence of e.g. a Dominance stat for Myriam should not be taken as an indication that she'll ever actually be dominant, no matter how high the stat may go.
Give us a sec ... here we are:
To which the counterpoint would be that the existence of a visible stat creates an expectation in the player that it will come to matter eventually, but that's not how the game is designed.
But Myriam is dominant on one pathway with Marc, and has been from a very early stage. In those scenes, she teases Marc and forces him to watch whilst she has sex with his friends, only allowing him to jerk himself off. And there are other scenes, like with Mike and his pool friend, where she takes control and forces them both to fuck her on the pool table, when it was obvious Mike preferred to leave and have her to himself. Later, if you make the Dominance choice, she tells Silver how much she enjoys being in control in sexual situations. All of this seems pretty dominant to me.
By this point, with Zorlun already moving towards the final chapter of the game, surely he knows whether he's going to use the addiction stat or not at this late stage? And if not, why would he continue to add to it ( it literally doubled in the last scene with Guy and his friends, if you allow Myriam to smoke weed)? I can't imagine, that he's just adding to that stat for the sake of it. Because at this stage, he must have a pretty good idea about what scenes he intends to make for the remainder of the game.