So, you can’t use a minor action to move out of Reach of an enemy.
The Sprint action allows you to make a Difficulty 0 Fitness + Security Task to move, apparently unrestricted by enemies in Reach, but at +1 Difficulty for being a non-Melee Attack Task performed within Reach of an enemy.
Did I miss anything?
Edit: Ok, I did miss the Disengage option for a successful Melee Attack. 