Razen aims to be a modern PCB CAD based on powerful tools from the software engineering world. Specifically version control to manage design sources, and a versatile "glue" scripting language to automate and extend functionality.
I have more experience with Mercurial than with Git. I would like to eventually have the version-control backends implemented as plugins, and would consider adding Git support if there was sufficient interest.
There are currently no importers or exporters to other CAD formats except Gerber and SVG. Support in for implementing import/export is available through the Plugin API.
Implementing a good autorouter is an enormous undertaking. I'd rather focus on improving the manual routing support. Functionality to interface with an external autorouter can be implemented as a plugin.