There is nothing new other than modifying the SJB for it's current (amps) setting for a failed bulb. This can be changed in the Electronics by changing resistors. I have not done it - need a spare SJB to see how it works and change components.
(have done it on VW - it was a lot more accessible) The flasher change mentioned above only affects the hazard circuit, and that is why swapping it will not fix any issues.