Same sort of thing can be done using /hotbar copy (as a ps3/4 user its /chotbar copy)
Put your different bars on your base class, such as a Marauder to a Warrior, and when you use certain skills they adjust your hotbar. An example would be clicking Maim on your hotbar would result in replacing Skull Sunder and Butcher's Block with Storm's Eye and Storm's Path. Pressing Heavy swing would also take you back to the default Skull sunder/Butcher's Block slots.

This sort of thing also works well with /hotbar change # where # is the hotbar number so that you can switch between bars fluidly, such as moving from Deliverance to Defiance or in reverse. Macros are amazing! Thanks for writing the guide I'm sure it'll inspire newer people to get creative!