Thanks for the feedback I really appreciate it! I never actually got the chance to test these guys out before the deadline so I'm not too surprised they need a few tweaks but I'm glad you still found them fun to play!
With regard to their scoring this is probably a case of me overcompensating. I thought that without the 2 or more spores per clearing restriction it might be too easy to score with this faction but it seems I was probably off the mark there. My other initial idea for the scoring was based on them scoring VP for the number of spore tokens left in the clearing after they remove it, but my thought was that would encourage turtling too much and Root is obviously at its most fun when everyone is fighting over territory!
For your example with Mushrooms, it might make sense to add a buff that when you build a Mushroom you get a free Warrior along with it to help with defending? I think as you say in your example you are most likely correct that it takes too many spores right now to get a basic setup with a defended Mushroom.
Regarding Death Burst that's very helpful insight - since you found their pieces were so valuable you never wanted to use the ability it might make more sense to change the ability to something passive more resembling the Lizard Cult's Revenge ability. Perhaps if any warriors were removed in Battle you gain 1 Spore to the Spore Chamber?
Thanks again for the detailed review it's super helpful and I wish you the best of luck in the jam!