The ignition switch problem is due to the fact that the power for the headlights is routed through the ignition switch, and the wiring for the ignition switch loom is too small to efficiently handle the current. This results in the headlights not being as bright as they should be and also the solder joints on the ignition switch failing due to the heat generated. The EB kit bypasses the headlights away from the ignition switch, resulting in brighter headlights and no ignition switch failures.
No True Words Spoken
I believe that the Roadsters are better than the older RIIIs, but can still be improved with the EB kit.