I figured out for to fix the bone rotation issue. But what I am left with is still messed up: scale is wrong and bone positions too, just compare left and right legs. What do I do to fix this? My current import setting are the same as default with "Automatic Bone Orientation" turned on.
Also! I need to be able to get these meshes back into Unreal and put them back on the original Skeleton to use the original animation. How do I do that? No matter what I try, it doesn't seem to be compatible either.