Yeah I really don't know about those costumes. The color scheme reminds me of a southeast Asian country's flag, and the form itself doesn't look too appealing. Let's hope the music more than makes up for it.
NMB is supposed to go on tour to the Miyagi prefecture on the 24th, so I guess it makes sense to make room for two days in, two days out so that the NMB members can focus on their tour. Not saying that that's the sole reason the shooting was pushed back though.