What you mean, Zentu, is called "open ends", but what we actually got is closer to "sloppy writing" (or editing - otherwise why so many mismatched dialogues?).
Tragedy can be good, and cliffhanger can be excellent, but midsentence stop only speaks of an unfinished product.
Yes, this is a good point.
"Open-endings" is majorly different than what we got. Ending an adventure in a way that leaves an opening for further adventures or stories is a good writing hack and if BG3 actually did that, as Zentu might be alluding to, I don't believe anyone would have an issue.
But what we got were "unfinished" endings. They TECHINALLY leave it open-ended to for content, but it isn't because they provided a platform for closure with the possibility of more adventure. It's because they just didn't finish anything.