Poor Nick is so inhibited....
Nick reminds me a little of Scott back in BB4. Scott looked really good on paper, was extremely popular inside the house (Jon famously said "Everyone should have a friend like Scott.") and he was the favourite to win at the start of the series. However he was deadly dull as a HM, and did very little.
With Nick, we've heard repeatedly for weeks that he needed to get rid of Harry, and once she was gone the real Nick would shine through. Well, she's gone and Nick still isn't doing anything of interest.
The only difference I would say is that I think Scott was being deliberately reserved in front of the cameras, whereas I think Nick is naturally like that...