When, in an approved apparition, Mary acknowledges the Luminous Mysteries I will rush to incorporate them.
Some historical perspective might be important. The origins of the rosary are "sketchy" at best. The use of "prayer beads" and the repeated recitation of prayers to aid in meditation stem from the earliest days of the Church and has roots in pre-Christian times.
The structure of the rosary gradually evolved between the 12th and 15th centuries. Eventually 50 Hail Marys were recited and linked with verses of psalms or other phrases evoking the lives of Jesus and Mary.
Our Blessed Mother encouraged us to pray the rosary; Show me where she defined the Mysteries on which to meditate.
I’m aware only that she instructed (maybe admonished) the children at Fatima to pray the Rosary “properly”.