As much as I love the Unfallen, there's one quirk of the Celestial Vines affinity that make them a bit frustrating at times: Going out and meeting non-adjascent Minor Factions is largely not worth it, given the amount of time it takes for the Unfallen to actually get Vines to them. Which, given the Unfallen's core goal of peaceful unification of all people's, strikes me as odd. I think it'd be reasonable to give them an equivalent to the Vodyani's "Brainwashing" ability once they complete a Faction quest or reach 100 Relations, something that grants the Minor Faction's trait and puts them under "Dibs" until the Unfallen can get their Vineships within range, so that other factions can't sweep in and steal them out from under you as you're clearing out the second pirate lair in your Vineship's path. Just as a hypothetical circumstance that I surely haven't experienced repeatedly. Maybe a Converted system could act as a Vineship in and of itself, starting the Vines coming its way the instant they get within range.