I don't know, but Kurotaki is actually such a decent guy. He is good at communicating, honest and direct, he is aware of his flows and he's serious when it comes to relationships and pacing so even though Hikaru is good to her but still I can't understand why people are just eliminating Kurotaki like that, well I'm still in the beginning so maybe I'll change my mind later
I think Sumiyoshi got Misa's fate because of the age... if I calculated right (I doubt that so please correct me) I think the current age of Misa is around 27 so 10 years ahead when she will get the cancer and be cheated on by tomoya she will be 37 ,and since Misa already messed up the timeline : when the cheating happened and I also think Reina and Tomoya marriage was earlier than the original version or at least that's how I felt it was, then the fate needed to switch to someone else while Reina is still in the beginning of the marriage and only 27 then she doesn't fulfil all the conditions, so who else around their fate already changed and fit the conditions (age and being married for 10 years and working on that white grape project etc) ? It's Sumiyoshi! Idk I might be mistaken as at first I thought maybe I'm overthinking it since we know nothing about what happened to Sumiyoshi exactly after she left the company or how was her marriage