Even with the clarification from NYSED about 17.5 hours, almost every Yeshivish (non-Chasidish) Yeshiva is still way behind the newly clarified minimum number of hours. Even yeshivos like Darchei Torah, that does much better in standardized testing than the local public schools, has four 40 minute periods between 2:30-5:30, four days a week, totalling 10.67 hours a week.
Thus despite doing much better than public schools, these regulations would require the Yeshiva to add over 65% more hours than they currently offer. This for students who already have a very very long school day, on a six day school week.
Thereby forcing the Yeshivas to either eliminate almost 7 hours of Torah study every week or add to an already heavy schedule on young children.