I think the recent update explains your first point. She has what seems to be a piece of his soul so perhaps that’s why he’s falling for her; she completes him.
As for your second point, I agree that there’s something she lacks. I can’t explain it well since her character is still pretty funny to me.
Yes, I also feel that the fl character is more opaque than other manhwas. Instead they could hve shown the characters in more depth like her kaneph family's utter need for money being reflected and being similar to her past giving her personality much more reasoning and also having the ml's pov in the manhwa on how he fell for her ...would make things soo much better.
I would just like some opinion on the story. Does anyone else think that....its not good? I'm not trying to talk bad about the story or anything I just feel it dropped marks in places. Like I don't see why he would start falling for her. It kind of just feels forced to me because she is the FL. Her character also just feels lackluster in emotional concepts, and I don't feel any connection to her. I feel like the manga "Forget about My Husband, I'd Rather Go Make Money" had a similar concept about just wanting to have money (not saying the manga is that similar just the female lead concept of wanting material possessions). But her character was built way better, making her more connectable to the audience. At the moment I just don't care about this FL, or think that she is an interesting character, I'd rather follow the ML, Purple Hair Brother or the OG FL of the original story. I just don't feel she was written well for the main character.
I do try and read more on the story in hopes something changes my mind regarding it. I made it this far to ch 55. But it has not improved at all. What are your thoughts on the FL, I'm trying to see if I should wait it out more and continue reading or not?