Although the youngsters don’t realize it, they have been looking at Kakashi’s handsome face from the moment they met Sukea. This means their mission has technically been completed successfully.
Personally, I like these fillers unlike most others. Kakashi isn’t my favorite because of nothing, dattebayo! Even though the mystery disappears slightly, I think it was a good decision to reveal it.
It stirred up quite some commotion as you may have noticed.
Read more about Kakashi: http://naruto.wikia.com/wiki/Kakashi_Hatake