I like the idea, but as I said in my last post (which has gone ignored)... you are looking at a very extensive data-set. A data-set which also includes circumstance. For instance, car A starts from pit lane but goes on to win the race. If scenario A, there was a safety car, you can pretty much scrap the whole race session as the safety car will have a major impact on the various strategies teams gambled on and in this case, a slower car could easily beat faster car through circumstance. However, if there weren't any events out of the ordinary, it is a huge display of dominance. Although I'm ready to stress that in any race, you are going to find a lot of *circumstance* within a race that lasts 70 laps and little over 1.5 hours. Think car benefits its position by a DNF ahead, a crash, driver-error, or a slow(er) pitstop, held up by backmarkers at a crucial moment or simply traffic by cars on different strategies.
What this nicely shows is that everyone drives a different race. The pole starter usually has half the cake due to clean air etc, cars behind them have the problem that passing might be difficult. So even a quicker car could fail to get passed a slower one if the track disallows it; see Monaco, Catalunya, heck even Brazil 2014... How do you quantify that kind of circumstance?
It's easy as night and day and tell that the Mercedes is the most dominant car on the grid since 2014. It's also easy as night and day to do the same with the RedBull in most races between 2009 and 2013. But how do you get the numbers to show that without going into depth of every single race and finding a common-denominator or formula that tells exactly that? I'd say it's next to impossible.
......which is why I'm back to qualifying data, even if it's only half the truth (IMO, it's way more than half - the Mercedes never missed a front-row in the past 2 years and neither did RedBull in the years 2009.5 to 2013), but you get this data without all the unpredictability of races and *circumstance*.
Also; just to add a minor point; 2014 is a Mercedes dominant year hands-down. So is 2011 a RedBull one. I'd also argue 2013, thanks to the second half. 2010 perhaps is a toss-up, though given the amount of victories Webb and Seb shared, I'd say that one too - easily. So we're left with 2009, which is perhaps a toss-up with Brawn and RedBull (I'll go with RedBull) and 2012, which was probably a toss-up between Ferrari, McLaren and RedBull. So we can probably discard most seasons of pure and utter dominance (2009,2010,2011,2013,2014) and concentrate on 2007, 2008 (Ferrari/McLaren) and 2012 (McLaren, Ferrari, RedBull)...
The question is; What do you want to find? A simple yes or no answer to a very complex question or do you want a complex answer in highlighting some arbitrary figure that shows by how much car A was more dominant than car B? I'd say that's pretty impossible, and less impossible limiting yourself to QF data.