Just to touch on the X-T1 again. This camera is great, fast and spot-on in the performance from the menus to the access to the SD card.
I only shot in jpeg, as there is no current RAW-support in Lightroom for the X-T1. The AF performed well, and I was happy with it for my needs. The AF-C is something to get used to and almost felt like a hit-and-miss at times. However, most of the time I was impressed when an object moved away from or towards me.
I did try the AF on some small birds. Now, I am no bird photographer, and can't really compare it to the a DSLR, but in my own opinion, I doubt it will work for bird or sport photography just yet.
I forced myself to use the battery grip on Saturday's shoot, and found I was struggling, at first mostly due to my lack of never using one. However, as time went by it became easy and natural, the only issue being getting your thumb to the directional button (D-Pad) to change focus points, but again that is very much a muscle memory. It would be nice if the functions you define on the D-Pad would rotate when you used the camera in portrait mode with the battery grip.
The grip does add some weight and size and gives the camera a far more pro-DSLR look. With that, it does lose some of its compact appeal for me, however it is still far smaller and lighter than your semi- to pro-bodies like the D600.
I've shown and let a few of my photographer friends try out the camera, whom all mostly come from the DSLR world and they've all found the camera very interesting. While some liked the buttons and sub-dial placement, most just loved the retro look and feel of the camera and the feeling they get. "That fussy feeling" and that sort of status you feel about the camera.
I do get the feeling this camera will attract more DSLR users over people who are already using the X-Pro1 or X-E1/2.