Personally, I think they will find this whole Family Worship Evening to be a total disaster.
The fundamental problem is that majority of family heads are not good teachers. Just think about the general quality of teaching/speakers in the Ministry School. Generally, the handful of good teachers rise through the ranks to become elders (though even amoungst elders the general standards are not high) and these are the ones who lead the meetings. The majority of people I have spoken to hated the old 'family study' arrangement; most found it tedious, boring and unexciting.
At least with old bookstudy arrangement if you had a good conductor it could be interesting and fun and there was an opportunity for a coffee, biscuit and chat afterwards.