Ayumi definitely continues to prioritize MC during the pool scene and they communicate a lot, though as you might guess there will be "distractions" that they both wind up enjoying. If you like what this MC likes, the scene is wholesome.
For my personal take, with much respect to the creator and knowing everyone has individual preferences and yadda yadda:
The remake, to me, now feels much less like a couples discovery story, where lovers are trying new things and growing together as they learn what they enjoy. It's more like a boyfriend training story where everyone but MC is already very experienced and waiting for him to catch up (which, as I'll explain below, he never will due to the story's almost exclusive obsession with physical attributes). I haven't enjoyed that shift in tone, and I only see it getting more pronounced as the story goes on. Some of my favorite games are entirely HTML text, so for me the visual updates are neat but narrative beats are everything.
There have even been times where I couldn't keep a straight face while reading. A GF that prefers dicks so big they literally don't fit inside her, while fucking MC who has a Three-Dog and saying things like "is this all for me" or "you fill me up so nice," is so subtly patronizing that it's funny. Ayumi is a size queen that goes into a mindless trance every time she sees a big dick, fawns over and fantasizes about large physically dominant jerks, and is dating a passive micro-dick twink. She spends most dialogue reassuring (even a Strong/Dom) MC as he giggles, stutters, and tries not to cum from being touched while he fantasizes about bull dicks. As someone who isn't into that infantilization/femdom kink or constant bull dick descriptions, it's more off-putting than erotic.
I already see the Dom/Sub paths winding up like Bioware branches, where if MC picks Sub then Ayumi goes and does what she wants with no rules and if MC picks Dom he "demands" (while stuttering and premature ejaculating) that she does what she wants with no rules. A branch merge might help speed up development; it would remove script complexity and not much would be lost because it doesn't feel like MC will ever be able to embody a Dom/Alpha in this storyline. I got visions of that SNL skit where Jonah Hill is "The Champ" when thinking about this MC hanging out with his friends. It's made fairly clear that MC will never be able to truly satisfy Ari or Ayumi sexually on his own. They like him specifically because he wants to hear about them fucking other people and "gets so hard" from it...? Based on some rough calculations, that takes 50mL of blood for MC and 3 gallons for every other man in that universe. Almost everybody can easily do what this MC does, often better. It's somewhat disappointing to never have it explained why Ayumi and Ari are so uniquely infatuated with this guy, despite so much dialogue spent dancing around "you're physically incompatible with my true sexual preferences, but I love you because you're cool with me fucking big dick Alphas."