We know that Zuldazar will be de facto 9 boss raid, but we will be able to experience remaining 3 bosses after we complete whole instance. But of course it won't be part of story, it will be some kind of flashback to us. And purpose of LFR experience is to show non-raiders story presented in raid (since it's probably one of the worst place to gear yourself, but often major events of expansion happen in raid).
What if LFR will have 6 bosses and only Normal+ will have access to other faction bosses? It wouldn't block any story content for people raiding LFR - they can make/use character on opposite side to experience remaining bosses. And it would be great incentive for some players to step up and try Normal, which is far superior raiding experience in my opinion.
What do you think?