To be fair adding those Georgia legislative races to the average can skew the average to be a little more favorable to Republicans than it should be. Every other race was a general election, not a jungle primary. If anything those were ideological primaries where the action was amongst the Republicans and the Democrats were not a factor.
Back of the enveloppe maths shows these 2 specials account for almost the entire GOP advantage. Without them it's R+1.
This thread is a good example of making data say what you want it to say
