Combine all dry rub ingredients in a bowl. Pat the pork shoulder dry with paper towel.
Rub the spice mix all over the pork, into every fold. Rub Worcestershire on top.
Place the pork in a slow cooker. Cover. Cook on low for 8 hours, or high for 4-5 hours.
Combine all BBQ sauce ingredients in a small saucepan. Simmer 5 minutes until thickened. Cool.
When the pork is done, transfer to a board. The bone (if any) should slide out cleanly.
Shred with two forks. Toss the shredded meat with half the BBQ sauce. Serve the rest at the table.
Pile onto brioche buns with coleslaw, pickles, and extra sauce.