I think the problem is that MLB is not able to maintain a stable streaming bandwidth and this manifests in different ways on different devices. Running MLB's bandwidth test I have had results ranging from 700 Kbps to over 15,000 Kbps. On the Roku 3 bandwidth drops cause pauses, dropped frames and jerky video. On other devices a drop in bandwidth has different effects. I have given up on Roku and MLB fixing this issue and I now stream games on a Windows media PC conected to my TV. I'm not experiencing the video issues that the Roku 3 does. From time to time I do notice the video resolution drop for a few seconds, probably due to a bandwidth fluctuation, but the video stream remains otherwise stable.
I'm no expert on this but I believe that the jerky video issue on Roku 3 would disappear if MLB could provide a stable streaming bandwidth.
i think you hit the nail on the head.
mlb.tv is most concerned with streaming to mobile devices. numbers warrant it.
NOT ROKU . they see TV format as dying and dont give a poo.
ROKU and all stagnant streaming devices are screwed.