[Spoiler (click to open)]
I'm not all that upset with Cas' death.
It's not even that I disliked the guy or anything, it's just.... his storyline just felt dragged out, at this point there's only one thing they can do with him, and it seems obvious to me, that no matter how much we want them to, they're not willing to head there. AKA, finally have Dean admit he's in love with the guy, and then use cas as a way to explore Dean's bisexuality. (admittedly, my concern for Cas has always been primarily how he affected the Winchesters, and I tend to lose interest when they give him a seperate storyline that does not involve Dean and/or Sam. The fact that I lose interest in Cas the more human they make him, does not help the matter either. I liked the guy cause he was inhuman, because of his differences, making him human, turning him into a woobie, removes over half of hat got me interested in the char in the first place)
I've also, always defended spn's tendency to kill off female chars, with the fact that no char on spn is safe, and that it's not just that they kill women and/or poc, except that the past few season well, they've doubled down on killing women and/or poc, and no matter what happened, two white men, who were not the two leads, were always safe as well. Their refusal to permanently kill off Cas and Crowley. (or to keep Bobby gone), only makes their constant killing of women and/or poc look worse. So, killing them off is a bit of a correction of that.
Well that and they'll probably end up bringing Cas back anyway. Whether it helps the show or not.