Thank you! I am hoping it will be a good puzzle of when to spread out to give out tokens and take cards to when to huddle and block nodes. While also having the puzzle of who to use for scoring vs card draw. My one fear is the more present factions being targeted more in a game than others, and that messing up their game.
The ruin interaction would be better explained in the Law, which is not made, but a Node Aide card is available. Essentially, when a facedown node is "removed" either as a building OR from ruin actions like "explore" or "raze," it is flipped faceup instead, but VP is scored as normal. Face-up nodes are just ruins that can still be explored and razed, but are not removed. They do not count towards rule for the Annelids nor as a faction piece, so the Rats would still oppress those clearings.
Essentially, they always stay on the map, but factions interact with them as normal.