Lets look at 2014, Deal beat the best candidate the Dems had by 8% points, 2% higher than his 2010 margin.
in 2002 Perdue won by 5% over Barnes. That doesn't show a trend to democrats to me, and neither does the presidential vote
First point is false. Deal's margin was 2% lower than 2010. He beat Barnes 53-43 and Carter 53-45.
Second point 2002 black voter registration was EXTREMELY low compared to today. There were far more rural whites voting Democratic in North and South Georgia compared to now. Black voter turnout and Dem leaning Asians and Hispanics are slowly catching up to counteract the exodus of white people from the Georgia Democrat Party. The demographics of 2002 are not comparable to today.
I do agree that Georgia needs a statewide win to give legitimacy to its battleground status. Fingers crossed for Evans for Governor and Barrow for SoS.
ETA: I would also concur that Dems have made inroads in counties like Henry, Rockdale, Newton, Douglas which used to be Safe R and now are Safe D in the cases of Rockdale and Douglas, and Likely D in the case of Newton and Henry. They need to flip Cobb and Gwinnett permanently, reduce margins in Cherokee and Forsyth. And find a way not to get blown out in the rural parts. It is a tough task but the Atlanta metro is moving strongly towards the Democrat Party.