As far as "special" music is concerned ... if it is special because it is worship and praise for our Lord (sanctified) .. OK .. but if it is special because The Miller family will now sing a special ... I'm not in full agreement.
Only the Millers can sing as the Millers do.
THAT'S what I mean about congregational singing ... the people can sing no matter HOW it sounds.
It's supposed to be .. after all .. a joyful noise
Thus you are saying that the only music should be that sung by only the congregation. That there should not be a choir or a soloist?