Grøh is such a badass and great addition to Soul Calibur In the beginning of Libra of Soul I was compelled to learn more about him, so when I teamed up with him I was excited to be learning more about him. I was no longer in the dark on his character and I could see his true nature. Mind you, I also learned about Curtis through LOS, so by the time I actually played his story I felt for him, and it made my motivation to help him in LOS stronger. That right there is a combination of good story telling and character development. They make Grøh edgy, but maintain a huge level of relatability that it makes his story compelling and interesting.
Whether you like the story for the game or not, its certainly better than SC4 & 5 with what it offers in content. Still, we are going to have to wait and see what DLC or other Plans Bamco may have for SC6.