1) Overtaking IS easier than it was in the last few seasons.
2) Vettel IS poor at overtaking. Or rather he hasn’t showed much ability in this respect. While for instance Webber has demonstrated overtaking moves in the same car (and even on KERS cars)
3) In that chart, Button is 1.5s faster on one single lap. In almost all other laps it’s less than a second. While Rosberg shows that he could go faster so in reality the difference is hardly more than a few tenths.

The best you could argue for is that Button shows he can do a best of 81.7 and Rosberg a 82.4. That’s a 0.7 difference.

The only thing the OWG set out to do was to make it possible for a car to overtake if it’s around 1 second per lap faster than the car it’s chasing. They accomplished this and this is demonstrated on track. Button is (at best) only 7 tenths faster so indeed that’s not enough.

The OWG did not set out to let cars just drive past each other. There still has to be some skill involved.

The amount of overtaking is actually more related to the number of possibilities. Like in the opening races with the odd tyre choices and resulting differences in strategy where cars could differ in lap times by 5 seconds.

People should just stop whining about there not being enough overtaking. This is the essence of F1. If people ask for more overtaking the only thing you get is the retarded tyre rule we have had this year and things like reversed starting grids.

The Montoya US GP penalty was so hars … what if that didn’t happen and his engine didn’t fail at Japan where he was leading and the fastest out there… We would be talking of Montoya Champ 2003, many forgot it:)

If you limit the dirty air wash of the car the better the overtaking. The rear wing is the aera where most of the dirty air is generated. Standard rear wing design were 80% of the dirty air is generated will allow the cars to follow closer. If the cars had a wide, and low profile rear wing the wash would be significantly less. Not only this standard rear wing would give teams a constant variable to to design front wings too allowing for closer racing.

they need to reduce the aero of the rear wing.

As for going around the outside of parabolica at speed, there are other factor other then aero the make that difficult. Tyre grip on a dirty unrubbered line which never get driven on, there is more road to cover going around the outside of a corner, the downforce difference and horse power difference between cars today is not big enough to allow for that.

Speed is not the issue, overtaking is the issue. If you limit the dirty air coming of the back for the car, the better the racing. 80% of the dirty air comes off the rear wing, this can be compensated by the floor of the car, which does not produced anywear near as much dirty air.

can anyone suggest some years for me please?

Yes martin

There. Simple really.

Sounds like some ‘historic’ series to me.;)