Thank you for trying my game and leaving such a detailed comment !!
I'll add lots of your points to my todo list; the separate axis camera sensitivity, smoothing the controller's camera (with a slider too maybe ?). I'm still not so happy about how the long/short press is handled, so i'll look into improving it.
The locks and Dialogues were added pretty lately into the demo, i didn't have much time to try it out, so thanks for this too, i'll take a look at it.
And i'm planning to add ways to distract the guards later on of course, i'm just working on the basics for now, equipping and throwing a cola can or that kind of stuff could be fun