They say firmware update will be coming so af should be better.
I haven\'t compared the fuji vs nex, but their corner performance is similar from the samples that I saw. I guess Fuji is using same 16MP Sony sensor. However, there is a difference btw nex-6 & 7. Klaus at photozone posted this:
I just did a quick test with the NEX 6 with the 16/2.8 (using the same RAW converter). I still need to do some checks so don\'t hold your breath yet. However, if you think that the results are a magnitude different you will be disappointed. The NEX 6 seems to be a bit better at large apertures (outer region) - which is disappointing from a NEX 7 perspective, of course. However, the chart don\'t look all that different.
Or in other words a 16mp camera outperforms a 24mp at large apertures. There is no scaling effect whatsoever here - normally there should be one - especially considering the difference in Megapixels. If you look at the various reviews you will notice that the NEX7 struggles at large apertures, not when stopping down.
