With the Corpus version of Kuva Liches on the horizon, as well as the Command intrinsics, I've been thinking about something that might make Liches a bit more interesting. The "quirks" are a fine concept, but what if there were more of them and they did more than just pepper in some alternate voice lines? What if they affected their behavior and/or combat prowess?
A few concepts:
"Inspiring" - As an enemy, thralls spawn more frequently and deal more damage. As an ally (converted lich), crew/squad mates deal extra damage.
"Trickster" - As an enemy, lich and thralls use mobility