IDK.

So many unknown variables. How many people are going from tank/healer to dps, and how many people are going from dps to tank/healer. I am sure the first one more than doubles the second one.

Then you have to factor in how many people outside of doing the storyline dungeons are going to use the DF to level up or just in general get a feel for the job, dungeon mechanics, the new battle system and overall changes in general.

And lastly you have to look at how many people are going to just level using PotD and the new fates. My guess is a lot of people but you never know.

We do know that on day 1 the duty finder wont be saying need dps like it did when HW was released. I highly doubt the queues will be better for dps when SB released, but I also doubt they will be any worse.