" MIC DROP " BTS Japanese version

The Japanese version of MIC DROP is wonderful! But is it meaningful to change it to Japanese to be honest? Song of J-Hope at the beginning sounds dull. I don't understand about that . The dancing and composition are great !! Especially I love Suga's part at this time.!!
https://www.youtube.com/watch?v=TxyHwwYe86Q&feature=youtu.be