My dear wife pointed me to this article today in the LA Times with the US News cruise rankings.
http://www.latimes.com/travel/deals/la-tr-cruise-rankings-us-news-world-report-20161114-story.html
I noticed the prominent Cruiseline.com listed in the rankings source. Interesting rankings with some surprising results and very comprehensive coverage through multiple categories.
The article links to the actual rankings list found here
http://travel.usnews.com/cruises/