So what happens when a driver suffers a bit of damage that the team would usually tell them to change diff settings for? Tough luck, the driver has to figure it out for himself?
The issue with this whole thing is that the drivers have a number of tools at their disposal, but they do not have all the supporting information to correctly use those tools without assistance from the team. All the settings on their wheels are for things the team have the information to advise on. The drivers do not know the outside air temp, fuel flow rate, cylinder temps, fuel pressure, fuel usage, etc to know which engine map to use. The team do, and they tell the driver.
And then thats before we get to the rather massive issue of appeal. Are we going to see every team collate the transcripts of every single other car on the grid at the end of every race and trawl through it for things they can claim was against the rules? Should we just not bother with the podium and wait until the middle of the next week for the FIA to decide who won and who broke the rules after reviewing every single radio conversation and every appeal from every team about every other team?
Its a complete farce. Like the team orders stupidity. Its completely unenforceable. Teams will just use codes, or use negatives. Can Hamiltons engineer tell him that Nico is slower than him in sectors 2 and 3? Or that Nico's tyres are cooler than Hamiltons? Nico is slower through turns 1, 2, 3, 4..... 6, 7, 8, 9, and 10? Are they allowed to tell them where other people who aren't their team mate is? Hell, are they even allowed to tell a driver during qualifying where he currently is in the standings?
Or just use safety? "Braking any less than 50m before turn 5 will be unsafe" while the driver is currently braking 60m from it, telling him theres a 10m improvement to be made? "Using mix 7 will overheat the engine" while the driver is in mix 5, telling them mix 6 is ok?
Its yet another completely stupid, badly thought out, knee jerk reaction useless rule from a bunch of idiots.