That zone has potential to be made the go-to place for level 6-16. They could maybe even add to the Flux (Frostfire) story arc by taking David Wincott, Flux, and Julius and combine them in to a 2 or 3 part Task Force. Change the zone back to a real Hazard zone by making the enemies a bit tougher (starting at level 10 mobs all the way to level 20 mobs) and increasing the size of the mobs like they used to be. Then they could do away with the mobs that really just don't belong there and bring the zone back to being what it once was by only having Trolls, Outcast, Igneous and CoT. Add a few missions here and there, make Bedrock, Gunther, Snap, Greased Lightning, Rundum and Mantle Elite Bosses. Change Frostfire and Gundor and make them AV's in this Task Force and it gives players a whole new reason to enter The Hollows for more reasons than just nostalgia. Now they have a Task Force that combines three contacts and give a whole new reason to take out Frostfire and Gundor while adding a bit of challenge to not only the missions, but the zone as well. Then they could drop that silly contact that literally takes you nowhere in the game and that zone will now be the go-to place to go after running the DFB a single time.
That zone needs to be dangerous again like it once was. The Hollows was made for teams, not solo play. People who want solo play has Kings Row for that. The mobs used to be stronger, more of them and the zone was filled with them. Almost everything you fought in there was red con or purple con. You just didn't do it by yourself unless you have simply out leveled the mobs. It was a Hazard zone for a reason and it needs to be a Hazard zone again IMO.
To keep this on topic (Sorry OP, did not mean to hijack your thread) they could do something very similar to the original Dark Astoria.