So since before WoD came out I speculated that they would make items like Falling Flame usable only in pre-WoD content. I got a late start though and when I got on eventually learned of Aviana's Feather.
Now I'll cut to the chase instead of giving you a story.
Falling Flame used to shoot you off in a random direction, now it's point the direction you want to go and click.
I haven't hammered out the details, but I feel as if using these combined makes your glider... Glide... Well... Faster.
I also wonder how many people remembered about this little beauty.
ALSO! I'm not sure if it helps with anything, but AF and FF can be used while on your Talbuk mount in Nagrand.
Hope I helped anyone, or at the very least reminded them about the item.