FWIF… what little it’s worth…
I think by just setting a day for the Luminous mysteries people are actually not doing what Pope John Paul indicated, that is, gather up all sorts of mysteries of their own invention and put them wherever they want. He just took a first step there as a model, was the message I got from him introducing them. He wanted it seemed, people using the rosary to meditate on everything under the sun directly using mysteries other than the traditional.
Needless to say the wishes of other Popes are expressed against making changes.
I prayed them myself a few times, trying them out, before I learned more about the reasons to retain the traditional role – and more about tradition in general.
Everything has its proper place. Even something good not in its proper place, is not fitting. We can easily meditate on what is in the ‘Luminous Mysteries’ one way or another branching off meditations from the traditional mysteries, not making them the primary mysteries, changing the relationship to the 150 psalms, and encouraging all sorts of other primary meditations.
A great way to make traditions disappear is to change them, or to add ‘good’ things to them, to the point where they are constantly in flux. I.E. no more unity in the rosary, wherever you go, they could be meditating on who knows what mysteries… on who knows what day. .
So… tradition. There’ve been enough changes and options and constant flux. There’re reasons things are done a certain way. Often you may not ever know all the good reasons, but they still help you. Often, you only know more of them, once you change things for a ‘good’ reason and then discover you lost something in the change too.