Honestly, once you understand what the game meant about alerted showdown, they are not as difficult as they first appear.
Suspects / targets are enforcers if you wear your suit or a guard disguise.
But, wear a civilian disguise, any staff ? They are back to normal, and as easy to observe as before.
The game says it once, but it’s easy to overlook.
But Marrakesh is also not that hard. As a reminder : server disguise is fully authorized in the school.