Grappler (rework)

You’ve developed the skills necessary to hold your own in close-quarters grappling. You gain the following benefits:

• You have advantage on attack rolls against a creature you are grappling.
• You can use your action to try to pin a creature grappled by you. To do so, make another grapple check. If you succeed, the target is restrained and you are grappled until the grapple ends.
• You can use your action to try to execute a creature restrained by you. To do so, make a Strength (Athletics) check, if the result is equal to or higher than the target's current hit points they are instantly reduced to zero hit points or knocked unconscious (your choice). If the result is less than the target's current hit points, they take bludgeoning damage equal to half of the result (rounded up).