In later years I've gotten the distinct impression that the writers have watched 1 too many of Michael Bay's Transformers movies... Specifically, Transformers 4.
Their smaller, contained storylines are usually so much more cohesive and just better. Sylvana's needs to die off, then they can go from there.
God I hope there's some sort of cataclysmic event at the end of SL and we return to Azeroth with a clean(er) slate.