use geom_* convention?

[mabafaba]

just an idea, but (at least for internal), maybe it makes sense to create functions that work and look exactly like geom_*() .. i.e. geom_boxplot_impact(); geom_grouped_barchart_impact() ?

to use like this:

ggplot(mydata) + geom_grouped_barchart_impact(...) + theme_impact() + coord_flip_auto_barchart_impact()

(where coord_flip_auto_barchart_impact() is like coord_flip but using sens.barchart?)
then there can still be a global wrapper

impact_grouped_barchart()