Finally, as you’ve seen in earlier previews, many classes in the Essentials products rely on basic attacks. The Melee Training feat allows a character to use any ability to modify such attacks. That feat has been updated so that it provides the new ability’s full bonus to attack rolls but only half to damage rolls. Melee Training offers its intended flexibility in creating characters without becoming a default choice.
For instance, a slayer who uses Melee Training to attack with Dexterity matches a Strength-based slayer in damage while gaining superior mobility by relying on light armor. A knight who opts to attack with Constitution gives up some damage but has more hit points and healing surges. Such characters are viable without becoming clearly better than ones without Melee Training, at the expense of using up a feat slot.