You can't get do a season getting 100% out of the car 100% of the time. Take 2010 example, he had to rag that car to the edge, thats why in middle of the season he made to 2 misjudgements 2 races in a row, Italy and Singapore - he had to be opportunistic as thats what get him there in the first place.2011 would suggest otherwise. Likewise the end of 2010, some elements of 2009 (awesome season for lewis despite result!) and 2008 suggest Lewis has improved little since 2007.
He got his Mclaren seat because he was quick from the word go. He wasn't just quick, he was only 1-2 tenths slower than the reigning two time champ at the time! Lewis was a MEGA rookie. No other rookie will ever achieve what he has. Jacques and Lewis were special in that respect. Lewis found his form quickly and was leading the title for most of the season!
In 2008 he certainly made a few mistakes he should not have, and even on occasion looked rather... so-so. He limped over the line to take his title after his rival dominated the race.
In 2009 he got every bit of the car's performance and used it! He used the Mclarens low speed grip to amazing effect and arguably out performed drivers in better cars! Still he made errors you would not expect from a driver of his ability. Monaco is the big one for me, and of course Monza. But Monaco was a killer mistake and I have never before, or even since been so disappointed in him. It was a race where he had the chance to show the world just how mega he could be. Instead he stuffed it in the wall and we were left to wonder.
2010. Epic start and mid season. He again got the max out of the car 100% of the time. Then once again in classic Lewis style, he lost it when it mattered the most.
2011. What do you want me to say about this season? It was perhaps his worst in F1.
2012. Similar to 2010 IMO. Getting 100% out of the car 100% of the time... so far.
Let me put it this way. I do not believe it is possible for Lewis to improve in terms of pace or ability. I believe he has NOT improved his race craft, or ability to read a race or even read a season. I think he is rash with decisions and sometimes shows to be a little too eager. He needs to learn when to stop, and when he has lost.
Ultimately this is going to come down to you, proving to me that he has improved. Based on your idea, Rubens should have been the best F1 driver ever. DC should have got better rather than turn to sh*t. And Jenson should be blitzing Lewis.
What seems to hurt Lewis is that we have Vettel who seems to learn from his mistakes and be a better driver because of it. With Vettel, Lewis can not rely on his talent or pure speed because Vettel is as quick, if not quicker. When was the last time Vettel was involved in a tangle with another driver? Or even when he made a mistake in qualifying or a race? I can't remember so it would be great if you could tell me?
I don't think you go on improving forever in sport as you age as sportsmen/humans have their peak. For F1 I'd say its around age 31, after this you won't gain anymore from your experiance.
As for Vettel, its been too easy for him when he has such a rocketship of a car. You can't separate his abilities from that of his car. With a dominant car you can easily give the perception of absolutely thrashing the field.
One thing that has never helped Hamilton in this regard is that even for a half a season he's never been fortunate enough to take it easy and rackup wins the easy way, and that goes a long way to ones perception of a driver.
Vettel is quick but how quick? is it the car? It's 4-4 this year in quali between him and webber. And in 2010 it needed the #1 driver love and support from Dr Marko, Horner and Newey to hug him and take off parts off webbers car and put it on his. How much is that support worth? That arrangement was everything for Schumacher and Alonso. Again Hamilton hasn't had this luxury, he has had to graft it the hard way with 2 world championship teamates. Schumacher, Alonso, Vettel never had world championship teamates to beat in the same car.