Oh yes, I completely agree with you that this movie changes their dynamic a bit. I would love to see them in a different way. I also really liked the callback to their adventures together, the enormous history they have that we haven't seen before. Also, in a way I'm sad that Hela died because I think their triple sibling hijinx could be incredibly fun to watch. I read that fic you recced on twitter and really liked that it pointed out the similarities between Loki and Hela - but also, they are quite different in that Loki's approach is "how can I make this person fuck up all on his own" and only pulls knives out of thin air if he's really pissed and/or in a bind, while Hela basically can't be bothered to expend the mental effort and just materializes really big knives so her problem can go away as quickly as possible.

(I don't know if you saw your kudos emails lately but I MAY HAVE reread your Thor/Loki oeuvre lately.)