I wouldn't change a thing. I'm really not a fan of making twins/multiples names different just because they're multiples. It's no different from naming singletons imo.
In terms of finding out sex to ease naming, I have no problem coming up with 2 names for each, even if I couldn't use my top names. However, I'm sure having an S/O to consider would make things more complicated.
Dreaming of...
Pandora Beatrix Clio ✦ Caspian Arthur Hale ✦ Artemis Georgina Ann ✦ Lysander Phoenix Noé
Ptolemy ✦ Horatio ✦ Nikolai ✦ Indigo ✦ Jesper ✦ Cedric ✦ Ambrose
Evanthe ✦ Calista ✦ Morgana ✦ Valkyrie ✦ Zenobia ✦ Demelza ✦ Adira