I’m going to limit myself to five changes, since there are so many I could list. Here we go:
1. Friday testing
From 8am until 5pm on a Friday (or an equivalent period for races with unusual start times) the track is open for testing. Teams may run up to three cars and four drivers. Engines and gearboxes used in Friday testing do not count towards allocations for the season.
2. Tyre suppliers
Multiple tyre suppliers are permitted to participate in Formula One, with the proviso that no single tyre manufacturer can supply more than three teams. This rule is conditional on finding sufficient tyre manufacturers willing to participate in F1.
KERS is permitted but not mandatory. There are no restrictions on when and how KERS is deployed, nor how much energy can be recovered. This should allow for some innovative solutions, such as an “always-on” KERS that provides a boost throughout the lap. Furthermore KERS could also be used to replace engine power rather than supplement it, allowing teams to run richer settings or lighter cars. The aim, anyway, would be to create different solutions among different teams, increasing competition.
A shift in focus to under-body downforce and ground effects. Innovative diffuser designs, for instance, are permitted, but winglets and associated nonsense on the bodywork are prohibited. This should reduce the aerodynamic wake of the cars and allow them to follow one another more closely.
5. Engines and refuelling
The teams are given a fixed amount of fuel for each race. Any engine technology is permitted, with the restriction that no more than the assigned level of fuel can be used during the race. This will promote engine-efficiency and allow greater variety amongst the cars. Further to this, refuelling is permitted but not mandatory. Whether or not teams decide to refuel will depend on their own engine/fuel requirements; this will again increase variation between the teams.