I'm not sure how you could be impressed by Vettel. No matter how you slice it, he's been out driven by his teammate. First of all you have to consider the fact that when Ricciardo has won, assuming that the Red Bull was under favorable conditions. It's been
Can........Hun....Bel
Ric 1........1.......1
Vet 3........7.......5
Hardly what you could call evenly matched results there.
These are the peaks I mentioned.
Now let's move onto other stats.
.................................Ric..........Vet
Qualified ahead................11.......... 7
Average qualifying gap......-0.046s.......-
Finished race ahead...........10...........3
Laps spent ahead..............428.........48
WDC Points.....................214........159
Very interesting of note here is the laps ahead. Proving that even though evenly matched, he's better at saving his car, tires, fuel, strategy or whatevere he's doing to make a very pronounced push to come out ahead of his teammate. You can say Vettel handled it well, but what's he going to do? He took tons of heat for complaining early in the season, we had the crying game over the radio where he was asking the team to move Alonso out of the way for him pretty please and he had the "tough luck" comment.
Something of even more interest is the qualifying results. Ricciardo leads there by quite a margin. Vettel was always credited with being a one lap master, and that is the one stat that's most shocking of all. I know the cars are difficult to handle and not nearly as planted as last year due to the loss of the blown rear. But even I'm surprised with his qualifying results as compared to Ricciardo, who had previously done relatively well in Qualifying against Vergne, but still... JEV was not a good qualifier.
In the end he's a 4 time WDC who lost his magic carpet ride, and he'll have that 4 time WDC status with him always, but this year showed each and every weakness predicted by Alonso, Hamilton and a lot of the people on this forum. I would have been more inclined to get behind Vettel should he stay and fight it out in his team, Red Bull but his hasty exodus from the team speaks volumes, further underscoring the black and white results above. Let's wait and see what palmares he can add to his dossier at the scuderia.
Expectation has a lot to do with it. Is Vettel failing because he's not repeating past glories, or is Ricc surpassing himself? Or are they doing both? Or neither? It's counterituitive to suppose Vettel is poor and Ricc is great, why can't one be good and the other better? If Vettel is poor, Ricc might only be average to beat him, so to reduce it to he's lost his rocket is a disservice to both drivers. And if Vettel was so great in his rocket, and without it he's lost, it would suppose these regs don't suit him, so these regs might just suit Ricc better than the previous ones, and why it's no use comparing and making definitive statements about drivers in completely different cars. All we know is Ricc took to this year like a duck to water, and Vettel has struggled and had to adapt his technique. And he has adapted slowly and the results show that.
The first half of the season Ricc came out on top more often than not but, peaks apart, not by more than one or two places. Only in Hungary did Ricc leave him for dead. The second half has seen a gradual shift, so now they are evenly matched (not exactly, statistically matched, but we shouldn't automatically go into the w/e expecting Ricc to better Vettel). Since the break it's equal in quali where equality allows. Ricc has finished ahead in races more often, but only 4-3, and like earlier in the season, there's not a lot in it, usually a single place.
So it's the expecation of Vettel trouncing his teammate that's not being fulfilled, not necessarily that Vettel is being owned by Ricc. But it feels like he is, which is the confusing part - we feel like it's a shellacking but it's nowhere near the scale of the Ferrari or McLaren drivers. So his main issues are the tyres, and getting the best out of them by adapting his technique, which as we have seen in previous seasons, cars and drivers are very sensitive to, and can swing championships. It worked in his favour last year, not this year. And if you're struggling with tyres it has a knock on effect to all those other things you mentioned, like fuel and strategy - even overtaking which has been one of Ricc's real strengths this year, that ruthless decisive streak which have been the difference between winning and not winning. And whilst Vettel isn't in that league, this year he's markedly improved, probably because he's had the practice.
And we've been over how he's handling it before, so I'm not going into that again, just to say he could have easily been a sausage and hasn't been.