- Rename \<thing>_case:nnn to \<thing>_case:nnF and introduce \<thing>_case:nn, \<thing>_case:nnT and \<thing>_case:nnTF - Add concept of key groups to l3keys, allowing selective setting of keys with the same 'path' - Remove .code:x and .meta:x key properties - Internal changes to seq and prop structures, allowing faster \prop_map_inline:Nn -- Joseph Wright