Well, people are waiting for more story content about the world of Spiral Knight: Tortodrone return/gunner update/new t3 boss + rank missions. I know that these things take a lot of time and i would ask OOO if we can have one or two new Danger Missions while we waiting for this great content. Danger missions are a bit 'spin-off' of the SK story (not really, but you know what I'm trying to say) and they often do not have 'new' enemies (status variant at most) so i think that it cannot take a lot of to design while we are waiting for these content (besides calming some people)
And yeah, i know that not everyone likes danger missions but this can be a good short update level without changing things on Arcada.
You know, we have had four danger missions almost 1,5 years. Why we cannot have one or two more? Gremlins + Beasts or Undead + Slimes can be good examples.
Danger missions most likely take a significant amount of time to develop, you can't just grind one out in a few days. Plus most of the work in Danger Missions is level design, and from the sounds of Eury's post the level design team is hard at work on the Tortodrone return and the new T3 boss level set. So new danger missions would only delay the update even further.
Not to mention, danger missions are fun for about 3 days. Then you figure them out and they're boring.