Hello Siara,
In my opinion, it is not worth the effort.
My observation is that under normal indoor lighting conditions, no details are visible at a typical viewing range. If you get really close, with your eyeball almost touching the model, you can just make out some dim basic shapes through the flood vents.
Outdoors, under natural sunlight, it is possible to see some vague details & basic shapes at a close viewing range. When you get very close and the angle of the sunlight is just right, it is possible to see some of the details.
Basically, once this model is displayed under a glass case, the pressure hull can't be seen through the flood vents or the deck holes.
Having said that, something is needed inside the hull to break up the direct light passing through the flood vents from one side to the other - a PVC pipe or styrene tube is probably enough for a pressure hull unless deck hatches are displayed in the open position allowing more light to enter.
Finally, there is some degree of personal satisfaction knowing that the detail is there even if no one else can see it.
Cheers,
Bill