A follow-up to my own question, in the event someone else has the same issue.
Touch track DOES work in 4k mode.
Not sure why I couldn't get it to go. A Sony rep helped me out - ended up resetting the camera to default settings, enabled the necessary menu items and it now works. It may have been a related setting or just s glitch. Either way, it is working now.
Sigma lenses are great for image quality and sharpness but the only downside is that Autofocus isn't reliable, especially for video. I've had the 35mm and the 50mm using the MC-11 adapter on my a7ii and it will hunt quite a bit sometimes. If you're willing to use Manual Focus most of the time I'd say go for it. Keep in mind I always kept my lens, camera and adapter updated with the latest firmware.
Samyang and Rokinon are pretty much the same company with different names. They have the manufacturers so there would be no difference in choosing one brand over the other.
I have the Rokinon 50mm F1.4 and the AutoFocus is barely usable especially in AF-C. My lens isn't update so that maybe the reason. I wouldn't buy it unless it's updated or if you are planning to get the Lens Station for future updates.The colors on the Rokinon were a little weird to me too. The photos come out slightly more yellowish/orange and sometimes acts up even with a color checker passport.
All in all, if you're interested in third party lenses, I'd look at Sigma because image quality, detail, distortion, and colors are far better than Rokinon and Samyang.
Hope this helps!
so my Sony A6000 fell and I cracked my lcd screen on the inside. The glass itself is fine but the lcd is showing damage such as white lines starting from where it took the hit. Also the part of the screen that was hit has gone black. Does anyone have experience with this? Is it repairable and how much would it cost more or less?