Oh yes, because character development i so superfluous, or treating your characters with respect. Plus it would have added only the funeral (ministry did apologize- offscene) which could have been done in less than half dozen pages.
Look, I know some people think mrs (it is mrs, isn't it?) Rowling can do no wrong, I enjoyed some of her books, but classical pieces of literature they are not.
Nowhere does it say the ministry actually apologises just that they made a mistake- they didnt apologise for it. Further by making a big deal over his death it would have detracted slightly from the big fight at the end.
I agree completly- so why are you so shocked that after reading what is about 700 pages of that book plus the couple of thousand other pages of previous books that she killed a character off in that way. She didnt spend too long on the death of cedric diggory nor that much on Dumbledore.