A feature that I think may interest some of you in DoN (short for Drunk On Nectar) is its 3D Nav Mesh for aerial pathfinding.
This game relies on aerial strategy and combat so units need to navigate a complex terrain (trees, various flora, landscape) while flying back and forth between their nests (eg:bee hives), flower beds for garden, safe havens, etc.
I’ll do a short Dev blog on it soon, but here’s an image just to illustrate what I mean.
I decided to bite the bullet and make my own flying NAV solution after I couldn’t find any “full-fledged flying” AI solution for UE4. I do remember one of the Epic devs mentioning in a Twitch stream that they could certainly add this if there was high demand but I couldn’t wait 
Not sure if this is something people would like to see on the marketplace (after Epic allows code submissions).