With Exploring Eberron, you will never run out of ideas as a DM. Even if you don't play on Eberron but in different worlds, it's A LOT OF STUFF in there.
It can be very intimidating, but give it time, it took me some weeks to have an overview of all the input (with RotlW as well).
It's amazing that you can have such lore with only 2 Books.
[5 of 5 Stars!]