Trinkets in BfA are moving back onto the GCD. "/use 13" is not intuitive. create a shorthand for Trinkets. like /use Trinket1

"HeadSlot"
"NeckSlot"
"ShoulderSlot"
"BackSlot"
"ChestSlot"
"ShirtSlot"
"TabardSlot"
"WristSlot"
"HandsSlot"
"WaistSlot"
"LegsSlot"
"FeetSlot"
"Finger1Slot"
"Finger2Slot"
"Trinket1Slot"
"Trinket2Slot"
"MainHandSlot"
"OffHandSlot"
"AmmoSlot"