Hi Evan. I have been trying to get caught up with this duplication problem in the sedum. I just finished with the sempervivum.
At this point we have decided to keep them as sedum with a synonym of the name change. Some of them have been done, but there are many yet to go.
Here is one that has been done.
Sedum (Hylotelephium pluricaule 'Isle of Sakhalin')
It became to confusing for many people and they are still hashing out the new names, so we decided to stay with sedum for now. However, it is important to add the new name as a synonym so no matter how the search is made it will come up.
