The "6.1 as a skip point" was raised ages ago and has only just floated up from the depths of the internet this week. I am not aware of it having been newly stated by the devs.

I suspect the whole idea came about before they actually wrote 6.X and/or was not communicated well to the writers, because the story is not suited to the idea.

6.55 would be a better starting point (even for the official paid skip) to properly introduce the important characters for Dawntrail before it kicks off.