There's something very BRANDYISH about the twins' voices and singing style. I LOVE their parts and harmonies and adlibs. The others were meh to me. This just reinforces why they were my favorite voices from the start. Don't think the others were needed, maybe except for Nivea. I really like Bird's Eye View, Say Something and Skeletons. The only parts I liked on that gospel shitshow were the harmonies. That track definitely wasn't needed.