This sounds like a terrible change that is a side effect of an unecessary change (removal of facing requirement on auto-attacks), especially without a dedicated Sheathe Weapon (only) keybind.The face target feature will become inaccessible while moving. This is in order to remove difference between different platforms. For casters, if the enemy moves your character will face the direction of the target’s current position. However, in situations where you need to face away from the target, players will not be able to simply turn around due to the auto-attack changes, therefore, you would either need to sheathe your weapon, or cancel targeting.
I'll need to think about this some more but I was wondering what thoughts others had on the matter.
Edit:
To clarify, as a caster my primary concern is being certain that I'm not getting hit with a gaze attack. The way things are currently, as soon as my cast resolves, I turn around and wait for the gaze to resolve. It sounds like with the 3.4 changes, I will have to turn around and sheathe my weapon. Turning around is one thing; as soon as I hit the back button, I am definitely turned around. But if I am also compelled to sheathe my weapon, I argue that I should have a button whose sole function is that it sheathes, and only sheathes, my weapon--not a button that will maybe pull my weapon back out when I want it away.
Gaze attacks have a certain charm from being a believable mechanic -- the thing prepares to appear horrifying, the players turn away to avoid the horror. Adding the extra requirement of disengaging detracts from that charm, as would the other possible interpretation of the quoted text where one might no longer have to turn around at all, but just disengage. In either case, I'm not a fan of this coming change.