I never comment on any of these but I'll personally say that she only not in the group because symmetrically its makes more since for a five piece girl group apposed to a six piece. Nicole is always gonna be the center but look back at who ALWAYS sang 2nd lead 2nd verse...it was mel. And she's there fsfs. So choreo will be easier, transitions will be easier..itll all be simpler with a main lead a backup lead and 3 other girls.