Great info post, but a few corrections/comments below…
I was unable to find a way to apply a saved set under the Custom Sets tab (where all my legacy save sets went to) without first paying a cost to assign it to an unlocked Outfit Slot. Care to elaborate the steps you used to “separately” apply a Custom Set to your currently equipped gear without assigning it to an Outfit Slot first?
On the Custom Sets tab there is a button to create a “New Custom Set” which allowed me to create 5 new save-sets at no cost for a total of 25 (up from 20 on Retail, although that too should likely be boosted to 50). Again there is a cost to assign a saved set to an Outfit Slot.
The cost reductions are not live on Beta yet… that’s happening 3-Dec per This Blue Post.