I have an App called NFHS network to stream high school sporting events on my RoKu express it buffers really bad while watching live events but I can watch the same events on my iPhone and they stream flawlessly. I guess my question is if I upgrade my Roku to the a better version will my problems go away?
Doubtful. All Rokus pretty much stream the same. If your Express is having Wi-Fi issues, a new device may help, but it would really be more coincidental than anything. Is it only that one channel that has buffering issues?