While Google continue transitioning AdWords report center into the Campaigns tab. Here're some available help resources, and a few new features released recently:
Help resources: If you're having trouble finding a specific statistic or reporting feature in AdWords, you can: Download PDF guide for a handy and comprehensive resource you can consult if you're wondering where to find particular metrics. Also a recorded webinar and extensive FAQs available on a regularly updated page in AdWords Help Center.
New features added to campaign management. In fact, some advanced reporting options are only available in Campaigns tab, such as segmenting statistics by device and click type. Additionally, you can now use Dimensions tab to view and segment performance by dimension of your choice.