What about Zero? And the Floor Two Mage Guild in general
Cass had promised to bring Zero with her after climbing the Tower, but leaves him with her Simulacrum.
Part of the reason for doing so was the fact that her Simulacrum didn't get the Angel's Sight Merit/Personal Trait and thus Sim-Cass struggled with some of the harder healing practices such as dealing with the Blight, and Zero was left to assist.
When Cass advanced to the Legendary Bloodline that made it where all with the Bloodline (which I am pretty sure her Simulacrum does get the benefits to) Have a +2 Tiers of Angel's Sight (and if tier V or under, can still see normally from the new third eye) this to me would seemingly make her Simulacrum capable of some amount of Angel's Sight (and thus using Blind Eidetic Speed Reading as well for the books in the library) that should give her some ability perform the Healing without Zero's help. Not to mention Cass gaining Life, Nature, and Holy Magics (and one status box even said Light magic, but I didn't see where that came from) plus she has gotten her Masters, Doctorate, and Surgical Doctorate and Advanced her class further. So I think the Simulacrum is set for being able to heal.
That then just leaves the situation with Cass technically having stolen the role as Guild Master, and the daily quest experience levels. When Cass was low leveled her minimum Daily quest reward was 10 EXP, and the Maximum, only available with an exception approved by the Main branch (as given for curing the Blight), was 100 EXP.
Cass is now level 150 for her primary class, that should mean that her minimum and Maximum EXP rewards should be able to increase (I think to 100 minimum and 1000 maximum? I don't think the other Crossroads guild members had their levels stated, but I know that several had 1000 EXP as their minimum). With Cass already lodging an official complaint for how little she got from her duties (which, did she ever get the promised replacement equipment/diagnostics gear/etc? Not to mention actually getting the official Healer Badge that her completed Quest said she should have gotten?), is she trying to spark another audit, this time for her being under-rewarded? Because I could easily see the AI choosing to do such, or at least using that as an excuse to get auditors to discover the Gold/Trash in the Guild Master's office, and/or that the Guild Master isn't there/that Cass is impersonating him.
That said, the Crossroads Guild is a minor Branch, in an inhospitable location, with minimal traffic, and the level of the floor is supposed to only be 10. The only reason for the previous, high leveled, Guild Master to have been assigned there was because the Town had been destroyed.
Cass having a Primary Class level of 15(+) times Higher than the floor level seems to me to be more than a high enough level to be a Guild Master for the Branch. Plus Cass has her Diploma, Masters, and Two Doctorate's in magic. Maybe Cass, or the Simulacrum at least, could be made the new Guild Master in actuality?