I have just updated my X-T1 with the latest firmware, which confirms one of my reasons to use Fuji due to their continued support of their products. Well done Fuji.
I’ve not tried all the features yet but ‘feel’ the autofocus is slightly better than it was. This was it’s biggest weakness over my old Canon 50D, which despite being several years old had a very snappy autofocus.
Yesterday I quickly tried the new focus tracking facility on a passing helicopter circling over the beach at Falmouth, which overall worked very well:-