You can do both 1D and 2D blendspaces in Unreal, so you end up with something like this: https://80.lv/wp-content/uploads/2016/05/walktorund2.gif

Very handy for character locomotion, but only gets you so far. I'm not sure how applicable offline processing is to this though, since if you have a large number of different types of obstacles to be traversed, you'd have to bake >= that number of animations, and your animation state machine would be enormous. The end goal might be to do that in real time, but I don't think anyone is going to seriously suggest running a neural net to calculate animation positions while the game is running. Maybe if you had some smarts in the level designer you could determine the potential pool of animations needed based on placed geometry, and build the animations at packaging time along with the state machine.