Qualifying is his major downfall but his excellent starts and overtaking moves usually get around that (and make it more exciting for us).
I get the idea that Sauber wasn't able to retain much in the way of past car set-up information from BMW when Peter bought his team back; although he's managed to scrape into Q3 at least twice so far this season (Pedro did it once, I think). Not bad for a truly consistent mid-pack team that looked set for fighting to get into the
paddock when the season began. All this from someone who never really starred in GP2 competition...he took the Toyota ride with both hands and gave no quarter to his competitors in his two starts.
The mid-fielders in F1 today almost always produce some sort of first-lap carnage lately, so it's
almost better to qualify 18th rather than 12th, if you gamble on the clipped wings or shunt that seems to occur to one of the Williams, Toro Rosos, Force Indias, et al...in nearly every race since the full-width front wings returned to the sport, so as long as you avoid problems later on, of course!
The start of the season looked a bit shaky, but Valencia was a watershed moment for his career. Yeah, there's this little bit of Jean Alesi in him that makes F1 worth watching. now that he's revisiting the two race tracks he's raced in F1 before, I think we'll see even better results.
A pity there's no open seats for better teams next season.