Although many feel Capture One does a better job, I still find I most times get better results from LR. However I agree with your findings, net, no change to the processing in LR 6.4 and if you push the files too much you get the over done painterly effect as if LR is magnifying the harder lines in the files, and I still also feel that LR has a lot more trouble on greens, leaves, etc.
Iridient does give more details to me, but the lack of a toolset like in LR, to me makes using the software limited for a lot of my files.
What I have started doing is backing off the sharpening in LR and then following up with Piccure+, which I find can do an excellent job on the files. Piccure+ takes a long to to run, but the effort is worth it. Focus Magic also can do a good job at times and is much faster. The key to me is not to let LR go over board with the image. And as you pointed out it's shots like yours with a lot of fine details that LR has trouble on, not close ups or portraits with details in the hair. What clued me in to this is how well the in camera jpgs can look (there are some issues with skintones that reviewers of the X=Pro2 say are fixed), but on landscape shots, I will always take a fine jpg as that gives me a starting point.
I also started working this same method with C1 conversions, still I feel that they need a lot of sharpening. I am not a believer in working a raw file and exporting it without sharpening so I always use some in my conversions.
C1 can easily seemingly bloat up the finer details also, so it's a trade off at times, but I tend to give the lead to LR, since it has HDR and pano built in and both work very well.
Here is an article I wrote back in October on LR vs C1, (note before C1 9.0.3) but I don't think Phase did any tweaks to the raw conversion for Fuji in the vr 9 code.
I love the Fuji system, and look forward to their new 24MP chip in the X-T1 platform, but getting the finer details out landscape is very frustrating indeed.
I would love to see Adobe just buy the rights to Iridient's process and be done with it. http://photosofarkansas.com/2015/10/27/fuji-x-trans-raw-conversions-which-is-best-lightroom-or-capture-one/And a pano from last December. LR and Piccure+