The indicator issue is down to the total wattage not being 'seen' by the electronic flasher unit, as there is no canbus. So front/side/rear is equal to 47 watts, the flasher unit is OK with this, the same as an increase when the hazard lights are on i.e. 94 watts.
Whilst wattage is important to the electronics and tolerance is critical, the flasher unit can however tolerate small differences in voltage for example, your 12 volt car battery is not 12 volts, and when the engine is running we know you are at 14 plus volts, but the indicator timings should not change, by law there is a minimum and maximum times that the indicators flash in a minute so voltage is regulated.
You can purchase 'corrected' LED's to correct the load, it is also fine for lighting in the older emergency vehicles, this allows hazard lights and warning beacons that are fitted with LED's to work for hours on end without flattening the battery.
Canbus, is upset by many things, many cars that come through me for importing need to have the reversing/fog lights reversed, of course no problem, I just swap the wiring and change the lenses, but if the lighting sets have the canbus which reads individual factory fittings then you cannot simply run a wire from one side to the other.......unless you can access the OE ECU, then you can 'tell' it to ignore the added load, I have not updated my kit to change eprom stuff for around five years now, but if I get the OK to return to work I may well have too?
Regards
Dave