Having killed 5 Kuva Liches so far, I really enjoy the system. I'm excited to see how the system develops & changes over the coming years, and how it is seen by the community.
The biggest suggestion I have has to do with farming thralls. I'm not 100% sure if the current number of thralls needed to unlock a requiem murmur is appropriate, but that aside I feel like the missions could be more rewarding/immersive. I think the best way to do with would be to allow players to enter a Kuva Siphons/Flood in Lich controlled territories. The way it currently works is you need to pick one or the other if the Kuva Fortress is near a planet with Lich influence. I think it makes a lot of sense for the Kuva Liches to be defending Kuva Siphons, and it would make those missions a lot more fun. Both Kuva Siphon & Lich thrall missions feel somewhat out of place, and random. But combining them makes perfect sense, and would be a very rewarding & fun challenge for players. Please consider allowing Lich missions to be done in tandem with Kuva Siphons/Floods.