So I was talking to some friends of mine about the follower benefits of Libila, and I realized that a huge part of the follower bonus is the use of Mycelium. However, Mycelium isn't allowed on Freedom and I'm curious as to why.
I imagine it would not be hard to limit mycelium only to a deeds border, as well as only allowing Mayors or Co-Mayors to cast it on the deed. To my knowledge grass is more aggressive then Mycelium without HOTS influence. For proof of this you can look at Rifts as the Mycelium tiles spawned by them are eaten up by the grass in a matter of days. If people are worried about not having to eat while standing on the tiles, they could turn down the max amount of nutrition to keep it under 90.
With these in place, I can't find a reason that Mycelium would be overpowered or being able to be used for Griefing.