I tested the new firmware with my 50-140 using CF and wide zone with my dog zig-zagging around the yard. I also performed the same actions with my Sony a6000 and the 16-50 lens (3.5-5.6). The Sony fired off at 11/fps. The Fuji was more like 7 maybe 8/fps. Much to my surprise, the Fuji had more in focus than the Sony. I would say that the focusing and tracking in the Fuji is improved. Is it where I would like it compared to my old Canon 7D? No, but it is close. I have another lens coming for the Sony. The 18-105 f4. That should be a good test.
As for Face Detection, well, the Sony a6000 is superb compared to the fair to average Fuji. But, for me, since I shoot a lot of sports, the important thing is good tracking and sharp focus. Right now, the Fuji X-T1 is holding its own vs. the Sony, but more tests need to be done.