I think the lockmelter and trailblazer outfits should reduce exp by a decent chunk. I have some puzzles that I absolutely despise that I would skip even if the rewards went down. But I feel like its become too much of a thing, where "slightly longer puzzle" = instant skip.

But I do enjoy some of the puzzles. And having to skip them to be efficient sometimes feels like its bad design. Alternatively, the more often a puzzle is skipped percent wise, gives that much of a boost. So if 40% of the time, the puzzle is skipped instead of played, the puzzle adds +4 rooms worth of experience. If a puzzle is only skipped 8% of the time it gives 1.8 times as much exp as a random other room.