The frequent disconnecting from the server happened to me last year. I followed the advice of MLB the Show and opened up the 10000 and 11000 bi-way ports and tuned the DNS to their preferred setting. This fixed the disconnects. Now, MLB the Show 21 is right back to where it was last year...I disconnect roughly every hour or two.
I have a wired ethernet connection. Did they change the ports or something? Does anyone have any fixes for this? Thanks.