You are right, the scenes do work better in context. I will think about implementing something like that, but I can make no promise right now.
If you do implement some kind of cheat system, I could see it being an unlock for getting the true ending if you want it to be more of a "reward," getting any main ending if you want it to just be an unlock like the gallery, or even getting all 4 main endings if you want it to be used more for "cleanup" and getting the remaining scenes and variants that players may have missed.