I'll start
1.No more specified engines, teams can run any multi-cylinder, piston driven, 4 stroke engine they want but it has to breath through an FIA supplied restrictor plate and use approved fuel. Fuel flow unrestricted.
2.Bring back re-fueling but with a gravity fed jug like NASCAR
3.Teams can use any two tires compounds they want but Pirelli must be informed of choice two weeks before race
4.Only 4 pit crew may work on car in pit stops (think of the money saved)
5.Restricted radio communication between team and driver.
1.No more specified engines, teams can run any multi-cylinder, piston driven, 4 stroke engine they want but it has to breath through an FIA supplied restrictor plate and use approved fuel. Fuel flow unrestricted.
2.Bring back re-fueling but with a gravity fed jug like NASCAR
3.Teams can use any two tires compounds they want but Pirelli must be informed of choice two weeks before race
4.Only 4 pit crew may work on car in pit stops (think of the money saved)
5.Restricted radio communication between team and driver.