Three things:Imagine if someone wrote a really lame Voyager book in which Picard acted completely out of character, made idiotic decisions and then was killed off. Don't you think DigificWriter that people would be a wee bit put out? This is what was done to Janeway in a TNG novel.
I will be fine about it if she is brought back and relegated to Admiral duties. Sure I would rather she was prominent in VOY relaunch but if she becomes a secondary character I won't even blink. It's her DEATH and complete and utter DISHONOR in how she was treated in a very badly written book that utterly pisses me off.
1) Picard has never been even remotely associated with anything having to do with Voyager, so your analogy makes no sense and is baseless.
2) When Star Trek Nemesis featured Janeway in a supporting role/cameo, she ceased to be a Voyager-exclusive character, so the fact that she was killed off in a TNG novel really has no relevance whatsoever to the discussion, IMO
3) I haven't read Before Dishonor so I can't speak as to its quality, but I personally don't see why it matters if the novel was poorly written
I don't have a problem with the concept of disagreeing with the editors' decision to kill off janeway in principal, but what's done is done and continuing to obsess over said decision and clamor for it to be undone is completely pointless and serves only to cast a bad reflection on the section of the Voyager fandom who would have preferred that the editors of the ST novels would have kept Janeway alive, particularly when the sentiment in principal (objecting to the editors' decisions) isn't universally applied with regards to the rest of the Voyager characters and their involvement in non-Voyager aspects of the Trek literary universe as it currently exists.