Feasts weren't just a "one time fun" thing, they were a tool for the player AND an immersive component that brought life to the game. It was a tool because it served as a way to raise relationships with lords and court ladies, in this case, it can still be used, but instead TW made relationships useless as they serve no purpose. It was an immersive components because lords activities weren't just raising armies, they were also having a life. Marriages for example, no longer require you to participate in a feast, as Lords would have done... instead they have been turned into another *grind the game* 2 minutes activity that show a cutscene and you're good to go get castles and lose them over and over.
there's just a bunch of npcs in one place... sure its cool to see it a few times, but nothing new happens, so it becomes just another tedious thing. That doesn't mean they had no function, but they were really close to meaningless, and getting in the way of campaigns. Definitely not worth asking TW for it.