One problem: I feel there are compromises and concessions in the storytelling - and with Chapter 1 I liked exactly that there was none of that, that you had the feeling the dev doesn't give a shit, how his vision appears and touches possible sensitivities of the audience. For example the whole episode with the couple doesn't sit right for me and makes only really sense to me as an effort to balance her submissive arc by an alternative sexuality: more autonomous, more equal, more gentle, all these tropes like exploring her sexuality, unfulfilled desires etc., and all this on her own, away from the two men in her life. Another example the Hotel-scene doesn't go fully in on an erotic visual level out of concern to be too gratuitous, I feel. Therefore it misses out in being really exciting on that level.
Another problem: The different pieces/sides of Vivians personality and how they come together. I see enormous desire for validation and also for security (which could explain clinging cryingly to the marriage and also behaving towards Christian like a desperate sponge for every bit of attention) I wouldn't say it's impossbile right now but the level of stupidity and crazyness mustn't to so high that I take the character not serious anymore as a viewer (and for me that has nothing to do with morals at all but with plausibility). I have to let that sink in for a little bit longer.