The only chiddushim were:
1) establishing girls schools because in the past girls learned from their mothers due to modesty. But since they were learning bad ideas outside the home, it was eis laasos laHashem, and gedolim endorsed the establishment of girls schools.
2) in a similar way we can apply this also to learning gemara for girls, because since girls are anyway learning to question, armumis, not only is it ALLOWED to teach them Torah shbaal peh, but in line with the reasoning for the halacha, we MUST reach them Torah shbaal peh, and not just the REASONS for the halachos, but also the SHAKLA VTARYA (back and forth discussion), because by nature, both men and women enjoy this learning more, and in this way they will get their armumis, questioning skills, in the spirit of our holy Torah.