I must reject your hypothesis, this is the entire game viewed through what I'd describe as an ntr-fandom lens.
Notice how in your analysis all those outcomes are decidedly on the ntr end of the scale - at the very best Tony is a willing voyeur, at the very worst they're practically split up. "Actions have consequences", except when they don't - many of the later game events happen on autopilot.
The hypothesis is not really that far off... now i agree there is a somewhat NTR lens people look through, myself included sometimes... but this is an NTR game so its kinda allowed.. but lets look at the endings he suggested
An ending where Anne is open and thrills Tony - this was the games premise from the start, it wouldnt be out of possibilities this happens
An ending where Tony has no real control anymore
An ending where he is second fiddle to someone else - Ive put these together cause they are essentially the same thing. Anne starts calling the shots... depending on the path taken this is already happening. Anne has become very much a Nymph and is doing stuff and men without Tony's knowledge. Tony has definitely lost control
An ending where they close things back up - cant see this one happening to be honest. they started this journey for a reason, I dont think there any going back. They have both realized something about themselves in this journey
An ending where he loses her - this would be the ultimate game over, however again depending on your route this is already happening.
there are 5 endings there on various parts of the scale - ranging from spiting up, to going back vanilla all the way to full cuck. but based on what we know from the game so far 4 are at least plausible. Of course as the game goes on, more possible endings will more than likely reveal themselves. The cuckqueen path hasn't been explored yet. the pair might decide to have an open marriage.
Now, perhaps that is indeed what mircom's goal is, but he's never struck me as that style or intention - it feels like it's supposed to be a hotwife-focused game.
I dont think its supposed to be a hotwife-focused game, It has however seemed to become the wifes game though. I do think it would be better told from Anne PoV rather than tony's, she has definitely become the star of the show once she became a nymph