Lev BY is also known as Levavi. This coming year would be it’s first year so I don’t really know what the girls are like. The few people I know who applied also applied to Darchi Binah or Pninim (but probably more on the frummer side compared to people going to DB or pninim.) The sem is same teachers as afikeh torah (afikeh is closing down at the end of this year. They also have some program with Rabbi Mechanic. When the Rabbi of the seminary came to speak to us he made it clear that he doesn’t want girls who hangout with guys.
I also think Ateres might be a good seminary for you. It’s a mix of girls (meaning how yeshivish)very out of towny. A lot of the girls listen to non jewish music and watch movies and some don’t. Also Ateres has 3 tracks (or maybe more) so doesn’t matter what your academic abilty is.