Me and my guild discussed this while bashing rainbow in the dark. We tried to really figure out why that quest felt like a real PNP experience more than others. Then I realized it was because of the torch, or light or whatever you want to call it.
Not to mention the bad missteps if you went to far ahead and fell into the spikes.

My question is can we possibly see more quests like this, including the possibility of having to buy torches in town in order to go into particular quests?

I think this would server some good purposes for making some quests a bit more to what PNP is like.
I dont think it should be every quest but some good ones would greatly enhance the playing experience. I would like to see more of these.