Yes. Even the best vocalists don't perform without at least some backtrack. Either they or Source really wanted to prove something because no kpop group doing these festivals have even been 80% live. I think they shouldn't have done it because they are a choreo heavy performance dance group. That is their strength. But I guess that encore did get to them.
Which i totally agree. They should have relied more on backtrack at certain parts and just focus on choreo (especially near ending of songs) cause they're a performance-centric group. If they dont put mics near their mouth and lipsync, no one will fault them. Lipsync is big no no but dancing without singing is more tolerable provided not overdone
Which again, thanks to the encore controversy, we are down to a super raw vocal performance with messy choreo - which choreo was supposed to be their strength