Among the many things that are better in the revamp, one is attention to Anne's motivation. In the original it was all about mindlessly following the emails until they went to Punta Cana, at which point Anne dove in with both holes* and never looked back, though it took her a while to loosen up back home. But it was always in the context of the MC's desires; what he wanted, who he wanted her to flash/have sex with. How Anne felt about it — if she felt anything at all — simply wasn't part of the narrative until very late in the game, at which point it was mostly too late.
In the revamp Anne's not only an active participant in her adventures, we're party to her interest and her excitement. If we play it right, we see her wanting the same for the MC (and if we don't, we see the massive difference in how they view what they're doing). The MC's still being a cad (pending player choices), but there's at least some hope for him. Meanwhile, Anne's sexual odessy is much more consistent: a potential threesome, a potential rendezvous with a woman, the locker room with Dre, exploration rather than just immediately banging away with Eric. Her own sexual drives are part of the plot before she decides that the MC isn't worth her attention, which is a complete reversal of the previous version. Unlike the original, there's now a sense that Anne is into this for her own reasons, but also — and this was the critical thing missing in the original — that she sees how this could add life to their relationship, yet also understands how it could hurt that relationship if it's not done properly. The MC still doesn't see it correctly, and I'm hoping the game will offer her opportunities to correct his mindset.
Another thing that the original sort of halfheartedly introduced was the idea that Anne's sexual past was a lot more adventurous than the early game let on. (Via various Nicole scenes and Marcus on the beach.) This is an idea I've seen in a fair number of written stories: the reserved wife who was sexually ravenous in her younger years and is hesitant about opening that door again because she knows just how dangerous it might be for her relationship. I'm not actually suggesting this because it'd be a branching nightmare, but an ideal game might — if certain conditions apply — switch perspective to Anne a half-dozen chapters in, letting her take control over their games because she's actually played them before.
* One of the odder things in the original was just how long it took for her to engage in anal sex. Chapter 9, right? Given the relentless attention that her allegedly irresistible ass receives, especially from the MC, I find that...unlikely. Either she's done it or she's been fiercely refusing it, but there's no way pretty much all her lovers haven't at least tried. I understand why it wasn't part of the MMF threesome in Punta Cana because that's really early in the game, but it really shouldn't wait until chapter 9 again. A well-behaved MC probably deserves the first shot; an ill-behaved MC should probably lose that honor to someone else.