Its all dependent on what instance becomes the most efficient for a SR.

As it stands, (I believe) WP is the most optimal for SR, followed by AK. This will NOT change unless SE makes a dungeon that gives just as many tomes and takes less time.

People who care about SR only care about gear and the time it takes to earn said gear. I can almost guarantee that WP will remain at the top, unless of course another dungeon replaces it.

SR is for THE most efficient dungeon you can find, given the new options we will have, its unsure whether or not another place will replace WP, if it does, it's highly likely WP will be abandoned SR wise and only the new dungeon that can be done in the shortest time while still earning WP equivalent in tomes will be used for SR.

And as always, if you use the DF in hopes of getting a SR, you are a fool, pre make the group and stop expecting randoms to cater to your wishes, just throwing that out there.