Looks like the Big Sky made a deal with ESPN to have the streaming on ESPN+. I think the quality will be higher this way. I don't know what that means for being able to watch every game though, and this is obviously no longer free. (Good thing I have it as part of the Disney+ bundle or otherwise I'd be more annoyed). Overall, this is probably a good move.
https://www.ksl.com/article/50182988/big-sky-conference-announces-streaming-partnership-with-espn
https://www.ksl.com/article/50182988/big-sky-conference-announces-streaming-partnership-with-espn