It's real simple ESPN+, and I assume it's the same for every other flavor of streaming ESPN, shows every game except TNT and NHL Network games. But if you live in an NHL market, you are blacked out any time the Sabres play that team.
One suggestion: don't change your subscription to the new version of ESPN streaming. You are grandfathered at the rate you subscribed at. I bought what was the triple package of ESPN+, Hulu and Disney, and still pay around $13/mo. All the new packages are way more.