I think with some careful fine-tuning and playtesting they will be a lot of fun. Maybe something that removed cards from the Horoscope would help. I hope you continue working on them, I know the player who played them had a blast!
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Funnily enough there actually was a way to remove Forecasts from the Horoscope in earlier versions, but I removed it because I was afraid that they would get completely shut out of the game. If end up working on this faction more, I'll definitely revisit the idea. I'm glad to hear that it was fun to play though!