We now have support for Visual Studio 2013 with NAV 2013 R2 when designing reports.
Apply this hotfix:https://mbs2.microsoft.com/Knowledgebase/KBDisplay.aspx?scid=kb;EN-US;2907585, and you will then open your layout in Visual Studio 2013 if installed.
Why can we use Visual Studio 2013? Because it also supports RDLC 2010 supported in NAV 2013 R2. Here is a small overview of the different RDLC versions and NAV versions and Visual Studio versions:
RDLC 2010 = NAV 2013 R2 = Visual Studio 2013 Pro(New), Visual Studio 2012 Pro or Report Builder 3.0
RDLC 2008 = NAV 2013 = Visual Studio 2010 Pro, or Express using this tip here
RDLC 2005 = NAV 2009 = Visual Studio 2008, read more here. Do not use VS2005
Not a single of the bugs introduced in Visual Studio 2012, which I know of, has been fixed, except the possibility to use the LEFT ARROW key in expressions. In Visual Studio 2012 this is not possible. Now with Visual Studio 2013 we can now use the LEFT ARROW key. So if this is driving you crazy, go and apply above hotfix and start designing you R2 reports in Visual Studio 2013.