Sure thing. Here’s the model and its UCX counterpart in Blender:
I spread them apart for this screenshot. Except for the detail of the window and doorpost, they’re identical.
Here’s what they look like once imported into UE4:
As you can see, something weird happens to the UCX counterpart along the way. This is Auto Collision + Use Convex Hulls off.
But, I also took your advice and switched on “Use Complex as Simple,” and this helped things quite a bit: the UCX mesh is completely disregarded and instead it seems the collision is taken from the static mesh itself. This works pretty well, although the detailed pieces – the window and doorpost – have very sensitive collision. Small price to pay, though.