I can be partially on board with this. Some decent mentions.

I couldn't care less for more boring hallways myself. Design some long term progression quests or mechanics into the open world. Coming to mind..... trial weapon quests in FF XI for example. Not to say I want a copy/paste of that, just something along those lines. Something that takes some time, in the world instead of instanced hallway, with a worthwhile reward at the end, that we can do with friends without being limited to 8 people. Things along these lines at least for those of us that like open world objectives. This game definitely needs more world involvement.