Our CMS are not efficient to be compared with Wordpress, the main reason I use Wordpress is all SEO tools are available in ease which you cannot create from your CMS. Wordpress is a time saver and a great platform for your SEO campaign.
Google doesn't specifically take Google Plus into consideration in search engine rankings, it takes social media has a whole. I would recommend you to go into Facebook, Twitter, Google Plus and other social media in which you can create good platform for your users or followers.