Position led doesn't make sense at all! GP3 is not a fictional mod... I added refueling (also if doesn't make sense at all too!) because is something not visible and that could be useful in some case for leagues needs...
Now what we did is to simulate the DRS panel (default option in upgrade), that decreases from 6 to 0 in about 40 minutes and I think it is much better than displaying the position into a DRS panel!
IRL, GP3 (and I think in the near future also other OW cars) uses the led panel for DRS... maybe this feature will be integrated with position in race using different led color, no idea atm. Then we'll see what S397 will do.
I was thinking to post just today, into another thread, the position led as option... and you posted here, LOL!!