I think most of the levels in Spiral Knights are a bit boring. The puzzles are very easy, and can be easily figured out with just a cursory examination of the area. I would like to see them be more challenging. For a typical gremlin level, for instance, we might see puzzles involving switch timing and switch ordering (e.g. the Scarlet Fortress switch-gate puzzles). For a jelly level, one might see spike timing, where one has to cross a field of spikes and travel across them in the correct order. In construct levels, there might be puzzles where ghost and explosive blocks must be struck in the correct order so as not to vaporize the treasure. Scarlet fortress levels might have mazes or switch-gate puzzles protecting keys.
This might be why I like the Scarlet Fortress and Candlestick Keep levels as much as I do.
In short, I would like to see as much thought challenge as combat challenge. Any second opinions?
Scarlett fortress has puzzles? Don't remember that...
Anyway, have you done IMF? I think that's the best example of the puzzle/combat hybrid gameplay Spiral Knights needs more of. Of course, both Candlestick Keep and IMF are considered high risk/low reward compared to the more grindy fight-focused levels.