Whatever happened to Destiny's Edge?
I get the impression they aren’t as popular as the new group of NPC,s. Possibly due to the lack of any interaction, possibly due to them being more connected to the novels than the in game story. We will see where it goes, but I suspect the writers are going down the path of involving this new group over DE since we are interacting with them every chance.
Everything in the personal story is stuck at an ambiguous time, as any player can do the current living story section before, during, or after any section of the personal story. This means that Logan, Ryltock, & co can’t leave the stations they have when new players meet them at level 2. The designers have sensibly written new characters that can be anywhere and do anything as the story goes on.