I'm sorry, but I don't think Ken Rockwell knows what he's talking about, at least when he reviews Fujifilm cameras. Of all the many blogs out there now days, his is one I never bother to read anymore. Nothing personal, but shots of kids eating cereal or back yard scenics is in my opinion not a true test of what any upper level camera can do, especially a tool like the X-T2.
I've been using the X-T2/Booster daily here in the islands where I work for the past 6 weeks and it has worked flawlessly for many different assignments. I can truthfully say that there hasn't been a day where I wish I had my Canon's back, or my Nikon's, or, I think you get the point. I still use my Linhof 617s III for certain shots, and once the GFX 50S is released, I'm fairly certain I'll be set. And by the way, I will be keeping my X-T2.