MonsterEnvy
Legend
You raise some good points MonsterEnvy.
I'll consider your points.
I may run into structural problems if I move things around.
The fact remains that if I have several back and forth trips to complete each 4th of the megagdungeon and then doing that again 4 times....my players will rebel. Even using side treks and such from chapter 6 to provide variety...they will grumble.
What I may do is introduce idea that other adventuring parties may be making raids on other 3 temples too...
They get to decide when they leave the megadungeon. Also The fane, the Cult temples and the Nodes are all connected to each other. So any party will be making more then one trip. It's unlikley that it would take more then a single trip to eliminate a 4th of the temples. Anyway their is a lot of exploration in the temples. The original temple of Elemental Evil was the same. Being a huge dungeon that will take more then one trip to get to the bottom of. Hell their are multiple entrances in the temple to get down to the fane of the eye and nodes.
It's a big place and I think some people will have fun with a megadungeon. I think making them all far apart would be more likely to rebel, as it just makes it harder to get to them and prevents truly exploring the temple, but I don't know your players.