Getting rid of blackouts is a big step forward. The second is to make the broadcasts entirely free, which will come eventually when the paywall results in reduced viewership for a relatively small amount of revenue. They will be lucky to pull in $5-10 million in revenue if they can get 10,000 people to sign up for MLB.tv, which seems like a stretch.
No matter how you spin this, the long term prospects are very, very good for fans of MLB and for fans of small market teams. As local TV revenue dries up in small markets, MLB will have no choice but to boost TV revenue sharing significantly. The Brewers should eventually end up on a more level playing field because of that, even if they have to take a short-term hit to revenue when they eventually join the group of teams without an RSN deal.