[2020] Wrecking Ball nerf?

I was looking at Path of Building when I noticed this Issue that's part of the fork: https://github.com/PathOfBuildingCommunity/PathOfBuilding/issues/555

This person brings up that there is a discrepancy between the in-game Wrecking Ball node and the same node in the current Path of Building (fork). LocalIdentity responds with "You are looking at the 3.10 tree which removed a couple of those mods from how it looked in 3.9."

I would have left it at that except that I was recently theory-crafting a duelist and I knew for sure that there should be 20% damage with two handers on that node.

So I downloaded the raw passive tree data for 3.10. (Available from here: https://www.pathofexile.com/forum/view-thread/2784312)

I confirmed that the data in this file for the Wrecking Ball node ONLY has the attack speed and stun duration, and not the 20% damage. However, if you check the 3.9 tree it definitely is there. Anyone can do this by logging into the forums and going to one of their character's passive pages. You can also see this in-game.

So what's the deal? Did GGG nerf Wrecking Ball this patch, or did someone leave out two lines of code, or am I missing something incredibly obvious.