My hot(?) take after watching the "Yume No Popstar" theatre performance
I think that all theatre performances should be sung 100% live, save for super dance heavy songs like Ne Mo Ha Mo Rumor. It's good practice for the girls and gives the vocally talented members a chance to shine, not to mention it's good for building stamina for fully live festivals like TIF. Idk why aki-p is so dead set on having the all groups he produces lipsync all the time anyway.