I thought Nievas was pretty good...
I think too many people just looked at his record, the fact he hadn't fought outside South America etc., and assumed he was crap.
In reality, he was fit, tough and has good power and decent skills. He's certainly a big 168. If you consider Mger Mkrtchian, Calzaghe's 14th defence, had an 18-1 record at the time and had only fought once outside Russia.
With regards to Choc's performance, he would probably be a little disappointed. More attacking and he may have scored a late KO. But it was an average performance, nothing more nothing less.