At first glance, it seems like the configuration could be a little more expressive for some common use cases. For instance, it seems pretty typical to build graphs that are collections of stats from different regions/instances from a set of metrics that have the form: stats..specific_stat.
One nice thing about gdash is the ability to define a list of instances/regions and their readable name mappings, which you can then easily build multiple graphs for different stats using.
Seems like that'd be a little trickier here.