There isn't yet a roadmap, as Central is still so tiny and the possibility space is so huge that we're still trying to fulfill basic features and learn what you all want. That said, among our top priorities at this moment are permissions and workflow features, like group permissioning. We also have an eye on data modification, as we know that's a big want, but we haven't yet figured out how it should work and it's definitely further out.
For data mapping, we encourage you to use the OData support to pipe the data into a tool that does mapping better than we could—see Yaw's post earlier in this thread for an example. Part of our hope with Central is that by outsourcing data analysis features to tools that do analysis full-time, you get a better analysis experience than we could accomplish with our fairly limited resources, and we buy ourselves more time to look at long-asked-for features (like the advanced permissions and data modification mentioned above). Because the OData feed is live, you can then just press Refresh in the tool to automatically get the latest version of the data, for live monitoring.
As for backup, the current theory is that in a case where you would need a backup restored it is likely you don't have a working, running Central anyway and so the backup dashboard wouldn't be accessible to you. In addition, we would have to build a lot of user interface for you to browse for files and choose the one you want, which would take quite a long time. That said, if it's a popular request we will of course consider it.
Thanks for taking a look, Sounay, and I hope that helps.