This is exactly the sort of thing I'm looking for, thanks!
I'm thinking each of the four "levels" of the facility has a theme. The game will be more of a Tomb of Horrors, in that if the players reach the end, all well and good, but it will be more of a "how far can they get" affair.
On the first floor, the reception and cafe and all that, there's the Riot Servitors, still patrolling in case there's another uprising. They're straightforward. Huge and killy. Set pieces include them crashing through partitions, LB-X'ing things and burning people out.
The second floor is the long-stay wards, where there are orderlies and Labour Servitors - only a threat if provoked, but creepy. This is where exploration will be key, since the players will be able to find out what happened. However, they'll have to deal with the first few Information Terminals, who will be obstructive and menacing. For example "Patients or visitors are not allowed in this area. Please return, or I will call security." If ignored, it turns to "Intruders will be terminated with extreme prejudice. For your own safety, please wash your hands when leaving the ward." I'll be keeping a track of how many Terminals they annoyed, which will be relevant later.
The third floor is Surgery. This is where I fuck with the players with traps, stealthy surgeon cyborgs and some really Gygaxian insta-kills if they fuck up. The motto will be PAY ATTENTION AND DON'T PRESS ANYTHING.
On the fourth floor will be Security and Materials Storage. Plenty of environmental hazards and the ultimate fight with the Security Response Drone, which will have been made out of the wreckage of a light military mech sent to break up the riot, which was destroyed by the rioters. The Labour Servitors have since rebuilt it and it will be the boss fight - I'll be going for maximum creepy and dangerous, since the Information Terminals will be its core.