With my printer, the optimal bridge settings are very slow (12mm/sec). That's all fine and good, except Slic3r uses the bridge settings when printing the first solid layer over infill. Depending on the part, this can result in extending the print time considerably. I find that depending on the percentage of infill, it might not be necessary to use the bridge settings.
I would like some control in the Slic3r settings that let me choose the maximum infill percentage that will trigger the bridge settings. Something like "if the infill setting is less than 40%, then use bridge settings when printing a solid layer over infill".