1. So p. much, it's the lack of a tacty-mappy? I'm sure we can find an arty person or a google-fu expert to conjure up a map and MS-paint some markers to overlay upon it. I'm not at all familiar with Titanfall's maps, so I'm not much help in that regard.
-I know it's a facility with bunkers, and a lab, and stuff... so I'm thinking either a Spectre manufacturing plant from the first game, or the secret Titan labs PvP map from the second.
2. Well, that was sort of a thing of Titanfall 2, I think... it kinda split the fanbase for reasons you already understand.
-'pain' would depend on how the pressure-sensors react to an explosive wave shearing through the metal skin for that infinitely-long fraction of a second. And maybe the warning of bleeding-out hydraulic fluid, reactor-coolant, and whatever other bodily-fluids a hyper-adanced Titan uses...
I don't want to try making excuses for something someone else did with incoherent technical-babble, it could also simply be an emulated emotion, and not a genuine reaction of Alma. (<---terrible reason)
Random electrical shorts/surges are unlikely to be pleasant upon the experimental processor and AI architecture. At least until those circuits get manually truncated.
3. Anyways, sorry to see you go. Hopefully something comes your way that gets your interest.