Summary
I'm literally just hoping for the day they kill off Yda/Lyse because damn did she get annoying when she became Lyse. Horrible writing choice. Horrible horrible.
As for deaths that were also unneeded, Papalymo. Like. Why? I mean sure it's a cool spell and all, but he had no set-up for even telling us that he knew that spell, let alone had the plan to use it.
I also feel like Minfillia just turned into a McGuffin they couldn't get rid of any other way, but again why do they need to get rid of her? They enjoy introducing characters to just have them die, in like the next scene. Moenbryda as you said is probably the worst of this, and that her death has such a lasting effect on Urianger, and we as the player are like "meh who was that again?" They don't have the guts to kill off any real political characters that would add to the plot, ie killing off the essential Queen of Thanalan- nope can't do that - nope, nope. heavy eye rolling but we'll make you think she's dead for FOREVER.
I feel like a lot of character's death I have issues with are obvious "too many characters" problems for the writers and they have no idea how to fix it.
Summary
Star Wars's dude that was Obi Wan's teacher is a prime example. He dies so fast that movie might as well just be a parody of the first, where Obi Wan himself dies. It just has no impact or meaning to me. He could've done a lot more to the plot if he lived.