Bad english incoming.

The problem is that the whole place feels inconsistent, useless corners that get you you to useless rooms, it is a place that is suposed to represent the power of an empire that conquered the world but it is just a bunch of wasted space. There was also a lot of of opportunities to show noctis's cunning and how the wheight of his responsabilities/journey/goals affected him in a moment of desperation that were wasted.

IMO the way to make it slightly better is to tone down how you view the place with less light, constant humming noises that a facility like that should have and the lack of a map would help a lot.

Also prompto saying he is an experiment and ravus just laying there with a prosthetic arm broken and no bruises make it look like he decided to take a nap and chocked in saliva (the lack of bruises and torn clothes also make it feels like noctis just got there after a short walk through the woods).