Hi mjramon,
I think I'd wait until the weather warms up in spring to re-pot. Do you keep the Plumeria inside during the winter? I've read that some folks unpot their Plumies for the winter and store them in a cool dry place until spring. We have a forum specifically for Plumeria
http://garden.org/forums/view/... that you might be interested in.
@Dutchlady1 is our resident expert on these beautiful plants and I know she will have some advice for you on repotting. I have one large plumeria that I put in the ground last spring but if we should have a freeze predicted I will have to dig it up or I will lose it. I will probably put it in the garage until @ March when I know winter is over for us.
Enjoy exploring and browsing the forums that you find of interest and don't ever hesitate to ask questions. We have a great group of friendly folks here who are always willing to help. We all love chatting about our gardens or favorite plants and sharing photos.
Again, Welcome!
Lin