Suggested

DRS Usage Limit

Currently watching GP3 highlights. They have a limit of 6 uses of DRS in the race. 
Could that be something that you could add to the game. Make DRS a button to click and allow host select limited or unlimited use for the league?

The rules for DRS in GP3 are broadly similar to F1 & F2, yes, they are limited to 6 uses but they still have to be within 1 second of the car in front and can only use it in the designated areas

Sure.  Put those who can't always attend races at more of a disadvantage.

There's not a lot of tyre management in the game so boost & DRS management would spice things up a little. 
As for inactive managers they would get auto use at random intervals throughout the race, much like the boost is used.