Make sure you are listening to your NPC's, they might be trying to tell you something. If an NPC tells a story- and it isn't obviously a joke- it's probably important. To be be blunt, I'm talking to a specific player about a specific thing.
Try to play "6 Degrees of Kevin Bacon" with the villains you know about so far. All of them are connected and (almost) nothing is random.
Think about everything you've seen happen at Grindr Grove (besides the orgies) at different times, how they might tie together, and how they might relate to other events or story arcs.
The shrines of the dragon gods have been defiled, preventing even a devoted Dragonborn like Zenzerena from communing with them. Yet Crixus received the blessing of a dragon god. What's more,the party was able to wield dragon's organs with greater proficiency than dragons themselves. What could it mean?!
I bet you thought it was just bad writing, but it wasn't. Well, the dragon organ stuff (PS - you're welcome) was ,but the part about the gods wasn't.