It's infuriating when a redesign has half the functionality of the original. It's not like it was feature-rich in the first place!
It's silly not being able to remove entertainment (aka celebrity gossip) or sports (even if I was a sport fan, I probably wouldn't care about every sport -- why can't I filter to MotoGP or what have you?) and having science be mostly several times regurgitated pop-sci and health be mostly fearing mongering nonsense.
I also regularly notice failures where articles they group together are almost entirely unrelated.
In the end, I still do RSS (although support in certain areas of interest are pretty weak) and Twitter (in a read-only fashion) and go to Google News over Apple News only by habit.