Bake the bacon on a slotted pan in a 375°F oven to very crisp. Chop 4 slices into bacon bits.
Mash avocado with lime or lemon juice, salt, red onion, tomato and cilantro.
Place meat in a bowl and season with Kosher salt and pepper. Mix in chopped bacon, Worcestershire, jalapeños, grated onion, garlic and blue cheese crumbles; form 4 patties.
Heat a cast-iron skillet or griddle pan over medium-high heat with 2 turns of the pan olive oil. Cook patties about 8 minutes turning occasionally; top with sliced cheese and melt.
While burgers are cooking, heat a small skillet over medium heat with 1 turn of the pan olive oil. Add sliced onion and allow to brown. Add brown sugar, water and hot sauce, and cook until sauce is reduced by half.
Spread avocado mixture on buns, top with lettuce, a burger patty, 2 slices of bacon and some onions. Set bun tops in place and serve.