It has already been done for Colosseum Party DG. It previously required 3 people to start it, now it is the same state as Elonohm (can be started with a single character on a party). It is especially crucial for Undo DG, because the DG itself is insanely easy. Kastrioti Mansion and Tower of Magic are also relatively easy (with current max gears), but it is understandable if it takes 3 to start them as a “stake” since drops in these dungeons are still in demand. However, imo it should be 100% done for Undo.