It is great that the staff is looking for ways to get players to use the "ignored" zones.
One suggestion that might work:
Actually have the Faultline Trial running.
Faultline is a trial zone... yet there is no trial running in it. If there is, I have heard nothing about it. Get the Faultline trial running, confer out the badges and Enhancements, etc and you will definitely entice quite a few people.
As it stands, the only people who go into Faultline are either:
A) Doing a hunt mission
B) Looking for the badges
C) Are killing time by looking at the sights
I've done all three, and I have yet to return to Faultline. I love the place though. It's a graphical joy to look at and is wonderous in its savage, destructive quality. It is absolutely beautiful to look at, but hellish to wade through on foot.
I would second the idea of kicking up the levels in there by maybe 5 or so. Put that in and get the trial running and Faultline may be saved.