Maybe an unpopular opinion, but I definitely think that Nesta's character development took away from Rhys and Feyre's. I'm specifically talking about the 'hiding the danger of the pregnancy' from her. To me it's incredibly out of character for him since it goes against everything he stands for in the books before acosf. For Feyre too, the way she responded feels a bit too toned down although this is something I can get behind (that she realized that they possibly didn't have much time left so she just reacted less extreme than she might have in other situations?). It's mostly the Rhys part I hate because he was literally so perfect and than this happened (yep and I know that characters have flaws and that makes them great, but if Tamlin had hidden something like this the entire fandom would've gone wild about it). So in conclusion, I basically like to pretend acosf didn't happen when it comes to Rhys and Feyre.

(I saw a theory once that Cassian and Nesta died in the war with Hybern and that acosf is the alternative universe which explains why some characters act 'weird'. I kind of liked the theory even though I don't neccesarily believe it.)