Place the chicken breasts in an even layer at the bottom of the slow cooker.
In a medium mixing bowl, whisk together the honey, hot sauce, apple cider vinegar, garlic powder, onion powder, smoked paprika, salt, and black pepper.
Pour the sauce mixture over the chicken breasts, ensuring they are well coated.
Cover and cook on high for 3 to 4 hours or low for 6 to 7 hours until the chicken is tender and easily shredded.
Remove the chicken from the slow cooker and place on a cutting board; shred the meat using two forks.
In a small ramekin, mix the cornstarch and cold water to create a slurry. Whisk this slurry into the liquid remaining in the slow cooker.
Set the slow cooker to high and cook the sauce for 10 to 15 minutes, or until it has thickened into a glaze.
Return the shredded chicken to the slow cooker and toss to ensure every piece is coated in the hot honey glaze.
Toast the brioche buns and assemble the sandwiches by layering shredded chicken, coleslaw, and pickle slices.