These examples are with the latest Lightroom?
I ask because I've seen many (dunno if it's gazillions - don't think I can count that high) comments to the effect that Lightroom now is in another league to Lightroom "then" as far as X-Trans support is concerned.
For example: Fujifilm X camera users rejoice: Adobe and Apple improve Raw support
Additionally, I see exactly the same kind of difference between Lr conversions of my Canon files and conversions from (say) Capture One 7 Pro, DxO Optics Pro 9 and Photo Ninja.
Lr is pretty well known across the board for producing relatively soft (in fine detail terms) conversions out of the box (read the Noise reduction and Sharpness section of this article for a fairly typical opinion): but it also provides the tools to address those differences.
Bottom line - I doubt that these examples demonstrate a Lightroom failing with X-Tran files, but are a demonstation of the typical Lr "out of the box" look, regardless of the camera in use...