DraQ
Arcane
Level design is better than Heretic and conveys fantasy themes pretty well.Hexen is much better than Heretic, but could use some dress-up and sense of direction with it's "puzzles", instead of them just being switch hunts.
Agreed, the level design is unnecessarily obtuse but I do like the hub-based design.
What is obtuse is the whole find switch->pull switch->run around entire hub to find what changed->repeat cycle.
Even going Hexen II style faux adventure would have worked better.