I'm unsure if this is intended or not, but another character and mine just recently ran the Astrolaborius quest in the Crosscurrents seam. There were only two of us and the quest seemed the same as when I ran it with 4 or 5 people. That first large room encounter had what felt like two dozen imps or more.
The AI of the imps also felt a bit strange in a way that felt new. At times imps would beeline us from a room away which I don't recall happening before. The combat routine of the final boss also felt like it was not as dangerous or elaborate as before.