I admire the work that you put into this
F1 Shift.net but I'm not sure that it gives a realistic picture of "driver" performance as such. For example we have two drivers, Rosberg and Hamilton now fairly close in terms of points in the WDC but a country mile apart in the chart. As far as I can recall, neither of them have committed a significant driver error (if any) all season and, in theory to my mind, they should be closer together with Rosberg's wins making the difference I guess. However, Hamilton would have one or two wins under his belt but for DNF's whilst well placed to take a win and he is ahead of Nico on qualifying.
Hamilton is also languishing at the bottom of the heap beneath a number of other drivers who have made gross driving errors this season. How does that work? I'm assuming that a lot of the "weighting" in the calculations is based on expectations but that doesn't quite fly with factors outside of the drivers control. If anything, in driver performance terms it could be argued that both Rosberg and Hamilton should be further up the chart since expectations for the performance of he Mercedes was low - implying that they were getting it to places it should not be.
Anyway, good work ... but I'd be interested in some clarification about how arrived at the weighting that you apply to the numbers.