Not following the intended path doesn't make the lack of variety and the design flaws disappear. You'll still encounter cheap traps consisting of zombies falling from a ledge at the ceiling and you'll still fall through the floor due to intentionally collapsing structures. It doesn't make the flashlights disappear which are there because of reasons. You still have loot rooms because of reasons (unless you want to tell me that you're going to ignore the loot).
Sure you can make your mental egg-and-spoon races and tell us how fun everything is and that we just have to simulate LBD or, in this case, simulate non-linear paths through the prefabs. Or you can look at the situation realistically and see that's not a good idea to pave the map with dungeon POI's.
Don't worry I am not mad at you since your reply seems to be widely unrelated to my comment. Btw. must be very convenient for a moderator to always be so in tune with TFP's decisions.

I hope someday you come to your senses realizing that you don't have fun! Hopefully it won't be too late!
Not everything I write is serious. The part about prefab variety, however, is. If the fun pimps decide to heavily rely on dungeons, they should make them more diverse from a gameplay point of view (Dead serious).