Tales and Chronicles
Jewel of the North, formerly know as vincegetorix
I think the special action features from the UA Skill for Feats would be awesome to add to the ''Using Ability Score'' section of the PHB.I think this would work better if there were useful, player-driven ways to use skills in combat for each ability score. As of right now it's really just Athletics and sometimes Stealth (environment permitting).
Note that, IIRC, the only printed rule for feinting in combat is a Battlemaster maneuver.
Ex:
Persuasion
When you take the Attack action on your turn, you can replace one attack with an attempt to deceive one humanoid you can see within 30 feet of you that can see and hear you. Make a Charisma (Deception) check contested by the target's Wisdom (Insight) check. If your check succeeds, your movement doesn't provoke opportunity attacks from the target and your attack rolls against it have advantage; both benefits last until the end of your next turn or until you use this ability on a different target. If your check fails, the target can't be deceived by you in this way for 1 hour.
Sleight of Hands
As a bonus action, you can make a Dexterity (Sleight of Hand) check to plant something on someone else, conceal an object on a creature, lift a purse, or take something from a pocket.
Arcana
If the character perceived the casting, the spell's effect, or both, the character can make an Intelligence (Arcana) check with the reaction or action. The DC equals 15 + the spell's level. If the spell is cast as a class spell and the character is a member of that class, the check is made with advantage. For example, if the spellcaster casts a spell as a cleric, another cleric has advantage on the check to identify the spell. Some spells aren't associated with any class when they're cast, such as when a monster uses its Innate Spellcasting trait.
+ special actions from the DMG