I've been saying this since the very first version; the only reason Tony is ostensibly the main character is that dudes resist playing female protagonist games. Even then, a fair number of the player's choices are actually Anne's choices, without Tony being involved. In TAC, nothing Tony does ultimately matters, save for that Elena BJ in Punta Cana. He can cheat and all that happens is a scolding, or the loss of a few relationship points. The only decisions that matter are those he (or the player) makes for Anne: whether or not to let her fuck Martin or Ryan, whether to just shrug either relationship off, whether or not to complain that she's taking things too far. In TACOS, at least so far, the only thing Tony can actually do that affects the core relationship is the same thing that he could (but shouldn't) do in TAC: try to stop her from fucking other guys. Narratively, I've always wished that this story was being told from Anne's POV, because what's going on in her head (monosyllabic though it probably is), in reaction to Tony's proposal to open up their marriage and everything that ensues, has to be far more interesting than Tony's perspective.
The few times that we do get a glimpse into Anne's thoughts, as (in TACOS) when she's deciding to cheat with Martin, are so much more interesting than Tony's perspective, and I welcomed their introduction in the current remake. I'd love to actually know how she feels about Dre, rather than extrapolating from the Tony's view and the renders. To be in her head while she's either (on one path) naïvely going along with the "bang everyone" plan, or (on another path) scheming to exploit Tony's fetish to get more of what she really wants, or (on yet another path) silently nursing her resentment over Tony's fetish and his cheating and vowing to get back at him, would be a much more interesting story. But to get that, she'd have to be the POV character. Still, you're absolutely correct: this story has always been about Anne.