Before some days Google News has updated his infrastructure for crawling with Googlebot which is primary user-agent. It means Google now retiring GoogleBot-News and they will be using now exclusively Googlebot for crawlink Google News Content. How does it affect? If any public or private organization want to contribute to do so then it helps publishers very little. Still google news respect robots.txt file for google news in form of user-agent.
1. Your Google Analytics Tool is able to differentiate user traffic come to your website form google search and traffic comes from google news. There are no changes in it. Difference is you will not able to longer see occasional automated visit to your site from new GoogleBot-News Crawler.