Button is not as quick from raw numbers. Visually and even by the clock his ability simply doesn't match up under equal circumstances.
You can't be slower 3 tenths a lap on a qualifying lap and be equally talented.
Hamilton does have an uncanny braking ability, this is observed fact. Button isn't even in the picture i that sense. If someone has to tell another this guy is equally good, and no one else can see it for themselves, then something is wrong. Check his overtakes, all done before he reaches the braking zone; keep in mind he chooses to overtake in this way as he doesn't play the last man brakes wins game.
His setups also speak volumes, his famous "it's on the nose, take off some wing".
And it's not always the hard braking zones, you need a good tyre feel to pull off some of the overtakes LH doing. Germany 2011 overtake on Alonso and on Vettel into turn 1? IIRC. Many more mid speed maneuvers he seems sure footed in the car while doing it. Hungary 2011 duel with Vettel etc.
I wouldn't classify Button as a pilot will exceptional braking abilities or car control.
He'd have put up more of a challenge last year had he possesed that ability. He doesn't push beyond what is considered comfortable.
The thing with this proposed system, it give you more than the feel through the steering wheel. I've never driven an F1 car to say what the steering is telling me, but more feel compounded onto the steering can't be a bad thing.
It's not like i am proposing to eliminate the steering wheel.
Secondly the steering cant say much for the rear tyres, the driver can only feel this through his back i suppose.
About the system the suit wont be any different than a current suit. What will be different is the driver may wear something like this on his ankles for example:
He will feel when the tyre goes on a painted line, when it slips on a wet curb, slides in the gravel, unloads on a wet track and feel the creation of a flat spot while the wheel is locked. All this stimuli coming in simultaneously for all four wheels. The driver would soon forget about the chassis and just see his limbs as the wheel hubs.
Finaly, keep in mind this system can extend to things like driveshafts, gears and other parts of the car that always fail because they can't be monitored in vivid detail. A driver will no longer need the engineer to tell him the gearbox will explode in 5 laps, he will feel it, he would know if its team orders or not!