Combine mushroom soup, milk, Worcestershire sauce, and pepper sauce; heat, stirring occasionally.
Add 1 cup cheese; stir till melted.
Place muffins on baking sheet.
Spread rounded tablespoon sauce on each muffin; top with crab meat, then avocado slices.
Drizzle with remaining sauce.
Sprinkle with 1/2 cup cheese.
Broil about 4 inches from heat 3 to 4 minutes or till sandwiches are golden brown and bubbly.