Possibility to also export Customized Content for Data Grid 2

Right now the new JavaScript export for data grid 2 is awesome!

Its fast,easy to add (no template configuration etc...),exports filtered data and the loading UI while the export its done it's beautiful but it has one small hiccup that it does not export any custom content. Well it does, but it shows "n/a custom content" in the XLS file

and in many data grid 2 use cases its giving : and cannot be used at all :(