Why bother with this complexity when they could simply bin the stupid "start on same tyres" rule and let everyone choose whichever starting tyre they like?
Because people don't care about which tyres they start on, button could have done a good lap on the mediums, but didn't, its about the condition of the tyres, not which tyres they start on. They have to use the softs(or super softs) in the race anyway, its more an issue with how fast they degrade and using them in qualifying is the only way to be competitive but also means they'll be most hurt by a fast lap and be worse at the start of a race.
Also complexity..... lol,
As said the issue isn't if you start on softs or mediums, Vettel didn't have to finish a lap, that is the issue. If he wanted to start on mediums, he should do a full lap at quali pace, then he can start on mediums. Button wanted to start on mediums and did a full lap, but stupid slow and he only finished the lap because it would leap frog him above Vettel, if Vettel had finished his lap Button wouldn't have bothered.
We need, to force drivers to all compete at the same level, IE everyone finishes a competitive lap in Q3, this would force all drivers to come out and do a qualifying run. Second, there should be a bigger tyre allocation, tyres that don't degrade as badly, and I think they should also be allowed to start the race on fresh rubber, even if they want to keep the same compound rule.
Such bad tyres everyone is pitting after 5 laps and all the leaders get caught up in traffic is daft, there is zero advantage for getting pole over not doing a lap, starting on mediums and having no traffic after 5 laps, its a disadvantage to qualify well in this situation and that is bad for the fans. People paid money to go to China and go to qualifying, then see 3 drivers not even bother to try. If this race ends up Vettel, Button, Hulk(it won't be for example) then next race, we might get fans turning up and seeing 10 drivers do an in and out lap in Q3.
Ultimately as always sport is about entertainment and competition, not doing your best in Q3 because it hurts you in a race is absolutely the wrong way to go about it. Everyone who gets into Q3 should have pole as a target and no way to sneak up a few places without racing, and have an advantage on those who actually push for pole.
Realistically if they want the start on compound you qualify on, they should let you start on a fresh set(well whatever set you want, if you have fresh tyres, that, or use your least bad used set). Ultimately what is best for the sport itself, and the fans, is if all 10 drivers did at least 2 ultra fast runs in Q3, maybe add in a extra set of Q3 only soft tyres.
Three drivers today didn't bother to compete in Q3, and whats worse is, they have a very good chance at doing better than the guy who got pole because of how stupid qualifying and the tyres work....