Peel cucumbers if desired. Slice in half lengthwise, scoop out seeds with a spoon, then cut into 1/4-inch half-moons. Place in a colander, sprinkle with salt, let sit 5 minutes, then pat dry.
In a medium bowl, beat softened cream cheese until smooth. Stir in sour cream, mayonnaise, Worcestershire sauce, garlic powder, and pepper until combined.
Add crab meat, green onions, and cucumbers to the dressing. Gently fold until evenly coated.
Refrigerate at least 15 minutes before serving. Garnish with dill or chives if desired.