The only problem I have with that change is putting the joyful mysteries on Saturday throws off the chronological flow of the mysteries (Friday, Jesus dies; Saturday, He is born; Sunday, He rises from the dead?!), which follow the life of Jesus. Doing the luminous mysteries on Thursday isn't so bad - they come in time right before the sorrowful mysteries on Friday. You take one step back from Wednesday's glorious mysteries and not two, to the joyful mysteries, as things go traditionally.
Another issue I have is while at face value 'proclaiming the kingdom' (and how many of us non-Bible scholars know what that bit of code really means? - I don't pretend to fully understand it) IS orthodox (duly note I said that), it isn't based on a specific incident in Jesus' earthly life. Sounds like something either the protestant/charismatic types or the liberal Marxist wannabe peace-and-justicers would have cooked up in the bad old days of the 1970s and 1980s.