7.0.10 update is just “laggy”, my average share speed is 171.32MB and I’m running only 1080p videos, so, it should still perform as awesome as before, no mistakes on my NAS connection. I don’t know why but, it used to be perfect all those years, since infuse2 but, now it’s absolutelly laggy! On the other side, my ATV4 is still running smooth.
Which version of tvOS are you using?
Does this also happen in 7.1?