Taunting was always useless to me. I never used it because he just repeated and did the same gesture over and over again and it felt so cheap and used-up that I couldn't keep using it. I was tired of seeing him do the same thing.
Also, that reminds me I recall some image back in the day when DmC was first announced. "Remember when Dante was all about parties and gettin' crazy? obviously no one at capcom does" when DmC Dante does alot more partying and getting crazy than the old Dante did. Amusing when you look back at all of those comments and how wrong they are now huh?
but yeah, taunting just seemed like something you used when your style points were going down and it wasn't really necessary beyond that.