Out here in the AA Eastern League, we regularly see 6:05/6:30/6:45 starts for teams' night games all season long. That started a few years ago. (Though 7:00 starts for Friday/Saturday games or those with fireworks afterwards aren't uncommon.) Some AAA teams have also taken up that trend.
It's interesting that teams closer to big metro areas (e.g. Reading, Allentown, Hartford) have kept the 7:00/7:10 start times. Probably more affected by where their fans come from, traffic patterns, overall work schedules, etc.
Personally, I like it as a regular attendee of my local AA team.