The two biggest complaints consistently around here are not enough old games, and not enough baseball.
As for the second, I don't get it, isn't every game available through BTN Plus? Why can't they simulcast that like MLB Network does with local broadcasts. Makes no sense. My guess is marketing tells them they make more money holding back and forcing the small number who really care to pay the subscription fee than they do from advertising money airing them on BTN.
They used to show more 90s games when the channel first came on. I'm guessing they must have gotten worse rating than when they showed more recent games.
Honestly across the board I haven't liked how mainstream BTN has tried to go. It's basically an ESPNU for Big Ten only. I liked how quirky it was for the first three or four years.