For a new Asp.Net MVC web site that need to support Globalization (languages, right-to-left/left-to-right, currencies, dates...): Is there anything new in VS 2013 that makes it a better tool for this over VS 2012?
Unfortunately not, changes in asp.net focus more on the development experience not internationalization improvements. The complete list of features for .net can be found here http://www.asp.net/visual-studio/overview/2013/release-notes#TOC14