More tyre degredation will make the marathon situation worse not better. As noted by the teams in testing, they ran to a pre-computed set pace rather than running as fast as they could. Quite a distance off the pace of the car. You won't be seeing a Mika/Schumacher situation where they reeled off 20 qualifying laps to negate an extra stop because the tyres can't take the levels of punishment. If a car needed 5 stops you are far better off being 3 seconds off the pace of the car and needing less stops and maintaining track position.
Webber himself said that in race simulation runs they went multiple seconds off the pace to give fastest time over a race distance.
The point is though, I guess, that its a way to artificially drop the pace, but that the by product is if you push hard to overtake the guy infront of you, largely due to the dirty air, rubbish downforce, sliding more, locking up more as you're trying to gain with less traction in corners, you're not slowing cars down, you're excessively punishing those trying to overtake rather than those cars who are steady and their rear wing is making all the work for the driver behind.
You work your butt off, get past the guy infront, but to do so you've hurt your tyres FAR more, and in doing so you make an extra pit and end up further back than if you just cruised around behind the guy infront.
We saw last year early on, was it Webber and Hamilton having a great race, pitting on the idea that everyones tyres would CONTINUE to degrade, so their pit would be worthwhile. Either the guys who didn't pit needed their tyres to continue to degrade essentially EVERY lap so they are FORCED to pit, or for the difference between bad/good condition to be a gap that means an extra pitstop and more "racing" doesn't hurt you over the length of the race.
When tyres drop off, but then level off and stay at that level for the whole race, and its not that slow, then someone who steers clear of traffic and doesn't really try to move up the field has a huge advantage.
Basically, end of the day the rules are trying to induce MORE overtaking, and they should, we want a closer grid with more ability to overtake with less cost to the car.
Then you have the issue that, one car dropping 3 seconds off the race pace to maintain tyres has insane aero, like RBS, and other cars are pushing the limit to keep up. Is it fair a better car has an advantage, yes, but not when they are cheating..... skirt around the issue but RBS are, though in previous years thats meant less tyre wear, this one seemed worse in the first race. Were those the "precooked" tyres they did in qualifying though, maybe, so maybe giving them a heating cycle was actually bad for them as their others sets didn't have that issue yet the heated cycle/avoiding wear at the start seemed to backfire.
I would argue that it is fair.
In years gone by a driver could follow another driver through a series of corners, without worrying about losing downforce/grip, due to the dirty air created by the car in front. You could see proper wheel to wheel racing. This created excitement for the driver as well as the spectators.
In 2011, we have a reached a stage where the car behind is at such a disadvantage (due to the dirty air created by the car in front), that something has to be given back to the car behind - an advantage, if you like. This advantage is called DRS.
If the driver in front is truly faster, then he will be able to open up a gap during the slower parts of the lap. By the time the 2 cars hit the straight, if he is over 1s ahead, the DRS for the driver behind won't activate.
The problem is that heavy aero dependency is here to stay, so the FIA have come up with a way to skirt around the problem (of dirty air).
Yup, I agree, the car infront due to dirty air seems to have gained a massive advantage. Years ago it was still harder to be behind another car up to a certain distance then slipstream was a clear advantage, that was "unfair" just as much as DRS is. Its only seeking to restore the old situation of slipstream working rather than being non existant.
THing is, lets say Hamilton overtook Vettel and DRS was a large component of that, next lap around, its Vettel who can use DRS to get Vettel. It might not be the best way, but as I said, its only really seeking to restore the "natural balance" before dozens of years of rule changes made the air behind a car so hard to drive in.
Have the teams purposefully been making both as good a rear wing as they could while also making the air as bad as possible for the team behind, probably. It evens up and everyone can use it, just not at the same time.
Ultimately we need to hit a point where slipstreaming works again, properly, and tyres give you two options significantly slower, or pit and having incredible gains. Drivers shouldn't be punished for driving fast, trying to overtake, trying to damn well race.