Dave
Frank
Actually the first car is helped, more or less depending on which track, by the dirty air and often could make the split without too much boost spent. However the trick is doing it with both cars together, as a single cars lap time can't compete with the averaged lap time of cars rotating to get a DRS boost. Of course DRS could be changed, but Kevin is right that then the question is what else keeps those races interesting in that the team with the faster car has an advantage but not just driving away, or overtaking becomes nearly impossible and races often would become mere boring processions of cars doing their laps. But perhaps let's concentrate on boost here, but with the whole picture in mind.
It's an easy answer to the question of what replaces the peloton and simultaneously avoids the faster car always winning in a predictable way...part of it is outlined in my last answer, more varied choice of tactics brought about by the demise of the peloton and something else that is a huge factor in motorsports...incidents. The dumbest thing about boost is seeing a car shave over five seconds off its laptime on worn tyres. If you push too hard on worn tyres, physics says you lose grip. No-one ever loses grip in iGP. If cars on worn tyres try to go too fast round a corner, so fast that they exceed the grip available there should be a n off, or a spin, or a collision. This is what happens in motorsports and provides much of the reason why the fastest package dies not always win. Reacting to mistakes also provides opportunity for managers to react quickly to a possible safety car or an opponent having to manage worn tyres to make a pit window. There are so many ways to challenge players within the actual reallife sport that videogame gimmicks are not needed. Motor racing is a fascinating and complex sport, it's not being done justice in the current race simulation.
I get your point, but that would not be implemented with a change in boost. A more kers like System would lead to a race more in trains. For example my race yesterday, i made the move successfully, finished 1 and 2 but the price for that was 30 and 60% of boost. With a more kers like System i had to stay in the train.
What you want is nearly impossible, because in igp everyone literally has the same car and driver, at lest in developed leagues. Maybe the higher tire wear when staying in a train could be a nice addition.
I am totally against crashes, because in this game are way too many ocons crashing into verstappens even when they have no chance. That would lead to massive anger and would need a solid penality System. Lets assume someone takes your driver out in the 5th lap, how would that be?
What could be a nice Addition are DNFs based on the state of cooling and reliability, so everyone is responsible for their own defaults and this 2 stats will gain importance.