When I got to this I was worried given the thread. I don't mean it as dismissive to other people's feelings but in general, in general, I quite liked the quest and felt pretty oppressed in a good way. (quest done on normal)
I think the major flaw to the quest is, imo, a lack of subtle guidance. By that I mean in many well designed games you can see, if you look for it, color changes on footholds or lights in hallways that are designed to lead your attention in certain directions. Here everything is so black and dead that my task was mainly making a map of the area in my head rather than any sort of guidance.
Also I think the quest could update when you find the battery before the magitek, just to help players know they're on the right path, as initially I wasn't really sure the magitek was meaningful or not until I came back to it a second time. So if the quest adjusted for example when you get to the edge of the area where you'd think is straight to broken glass (which has a red wall, so obviously you weren't mean to go that way- which is what I did initially), then the quest is like "find a different path, this is blocked" or something. Then when you get to the battery before getting to the magitek it might update with a secondary objective, first perhaps being ???, that says find a use for the magitek battery.
Anyway like I said I don't mean to be dismissive but it wasn't so bad for me, I just thought it was rather far from where the game is normally gently, or strongly, guiding you to suddenly "figure it out or get rekt".
I think people would faired better if the 'level' design of the area was better at subtle guiding the players in the right way, and perhaps with Fan-dan-boi taunting you in the right direction if you really go off course or are running low (maybe he does, I didn't get that low in time). With the better guidance so players head the right ways more readily you might lower the time you have in normal, as I had most of it to spare at the end- but I can easily imagine someone not if they got really lost and "wth am I supposed to be doing?" feeling.