As the original author of this plugin, I can tell you the motiviation behind that scheme. The single key characters are for frequent DO_THIS type things, like Open a job that is highlighted, or move up and down in a job list (e.g. View). The g-X combinations are for dramatic movement across major boundaries. Like GO-HOME, GO-CONFIGURE, GO-VIEW
{prompt}
. The G means GO, to GO to another page kind of thing.
I am really happy that someone is using and contributing to the plugin.
I just see this change as breaking some key behavior, and frankly speaking, the people that use keyboard shortcuts are obsessive types that do not like behavior being changed... 
First step : I will change "b" by "g-b".
Second step : I will try to allow edit/modify the keyboard shortcuts.