The team popped on a livestream yesterday to cover a half-dozen features that are coming with the update, including the return of two companions (the Inquisitor’s Ashara and the Imperial Agent’s Vector), some screens of the improved conquest user interface, an embedded trailer for Izax, and the lore behind the Gods of the Machine operation.
BioWare said that it is slating class balance tweaks for 5.9, not 5.8, so you’ll have to wait a little while to see what these utility changes will bring.