Yeah, I will say Helia is the best one of Savin's sluts, because you can at least pointedly tell her "Stop being a slut". While I can't say I'm too fond of the whole "reformed slut" archetype, it's handled alright for what it is.
Here's a real hot take here, but I actually think Anno is the worst of the three. For all people complain about Cait shoving herself in every scene, Anno does so even more plus she keeps trying to proposition to you randomly. Not to mention if you romance Syri, Syri suddenly gets the hots for her sister too. You bring in other crew members onboard your ship, you'll suddenly get a scene where Anno's pulling them to her room to bang. And again... SHE FUCKED OUR DAD! Fucking hell Savin, I don't want to be tunnel buddies with my old man!
I can only recall a few moments where Cait barges into a scene to slut it up, like your marriage with Atani. And even then, she's usually running off with randos and not your companions. Imagine if Cait just ran around the Wayfort, pulling Drifa, Elthara, and Zhara into her bedroom.
You know, touching up on Brint/Brienne. Doesn't he got a bunch of bastards running around? It would be interesting if one of them showed up and found their dad's now a chick. Sort of like Solveig. But hopefully with a less eye burning design.