After all the comments here, I've now played through the game a second time. I thought that if so many people were crying, I must have missed something important. Maybe I didn't understand something either. Checking yourself and your own opinion is an important basic characteristic of adult civilized people. Well, I'm sticking to it. The game is better in its current state. The incest stuff isn't needed for the story. The mafia stuff didn't come as a surprise. That there is some form of organized crime has been in the game for ages. No one ever implied Ocean was good at storytelling. So I don't expect him to adopt the Hollywood clichés about the mafia either. These clichés are just as out of touch with reality anyway.
By the way, some said the whole thing about taking in children of wiped out mafia families was unrealistic. Also that these children are then misused for marriage politics. Well, there have indeed been such cases. Both the Ndrangheta and Cosa Nostra have a number of known cases. One such case is, for example, the marriage of Giulia Immacolata to Vincenzo Macrì. Such cases also occurred in the historic blood feud between Greco clans in the 1940s. Allegedly also in the San Luca feud in the 1990s and 2000s. But in the case of the latter, it is more likely to be the conjecture of investigative journalists, as I am not aware of any evidence.
So all in all, one can make the game worse than it is just because one is anal about the fact that ones favorite fetish is no longer included. But I don't have to take that seriously and accept it as a basis for discussion.