It might be a bit late but for those of you that have not heard yet GW has released a new FAQ for SBG. Some interesting changes including a small buff to heroic challenge and a range decrease to natures wrath after many long years.

https://www.warhammer-community.com/2019/08/01/middle-earth-the-word-and-faqs-of-the-valarfw-homepage-post-4/

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"Draw your sword with a heavy heart, but swing it with a heavy hand"

The Nature's wrath is a big change

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IH ballista too ! Greats changes I would say.