Marvel is never gonna close the door completely on her relationship with Bucky, just like they'll never close it on her and Clint, or Clint and Bobbi. They're all popular ships that a lot of people love and have deep history, just like so many others in the MU. But I agree this felt like Kelly Thompson washing her hands of it all for her run so she can focus on Natasha alone, and I don't think it's really fair to Natasha as a character to say she was just putting a pin in the relationship until she deals with her grief and then she'll immediately go back to it.
Right now I'm with Matt in that I'm more interested in the fact that we seem to be getting heroic Natasha back. I loved how she was in Secret Empire, and I haven't really felt a connection to the character since her resurrection as to me it felt like some writers went too far in trying to make her cold and edgy to overcompensate for her being perceived as "too soft". I also like that it seems like Yelena may be sticking around a while instead of Natasha completely cutting everyone out again. And Thompson has been doing a decent job introducing new characters so I look forward to seeing what she does with this new villain.