What I don't like on the Bionicle with CCBS is the FLATNESS. This just doesn't suit to the Bionicle style. Even in the latest years with Glatorian or Stars (especially), even when the structure got really simple, there just weren't flat pieces.
I love the current Lord of SS. When you take a look at him, you can see sharp, technic pieces and I if it had eyes/teeth created from pieces and not from image, I would say that IT IS Bionicle. I would like to see some combining of old Bionicle pieces (e.g. shin) with the new CCBS parts.
On the other hand, what I really like at the actual 2015 Bionicle sets is the mechanism of their hands. That's something what the original Bionicle sets were always missing (except the first, 2001 - 2004 (?) ones). If they didn't try to hide the interesting construction in the body by (again T_T) flat pieces and somehow show it in the body, I think it could be way better.
However I can't say anything about MOCing with it. My creativity with it is seriously bad, but when I look at MOCs in this thread, I would say again that combining the pieces would be good idea