Here is my take on updating a couple of old feats to the new edition.
Weapon Finesse (Heroic Tier Feat)
Prerequisite: Dex 13
Benefit: When making a Melee Basic Attack with a light blade, you make the attack using Dex vs AC. Damage is still determined normally.
Improved Weapon Finesse (Paragon Tier Feat)
Prerequisite: Dex 15, Weapon Finesse
Benefit: When making a Melee Basic Attack with a light blade, your Dex modifier is used instead of your Str modifier when determining damage.
Deft Opportunist (Rogue Utility 10)
Immediate Interrupt Personal
Trigger: An adjacent enemy provokes an attack of opportunity from you.
Effect: If you choose to make an opportunity attack against this opponent, you can use an at-will attack with the weapon keyword instead of a melee basic attack.