Suicide in a game - not a good message and it lessens her sacrafice. Amanda and Devrim are not complaining but merely pointing out the grim reality of their own mortality which sets the story's tone. Amanda could come back later as a Guardian or some hybrid Guardian. This season looks like it's her demise but could be just the start of a new Amanda and a new storyline. Whether Bungie realizes or not or has something planned, the relationship theme of her and Crow are really not resolved. Now that we got the last recording, Zavala mentions that if she came back as a Guardian, she wouldn't have any memory of her former life but Zavala would remind her. With the Traveler damaged, maybe a darker or a lost Amanda emerges. The key things we got here for a potential future Amanda story - her relationship with Crow and her relationship with the father figure Zavala. This is speculation but one thing is certain is that Amanda's death seems a bit off.