I run it both ways 75 down to 285 and around the west side. Construction is bad now but during non commute hours its doable.
We also take a different route which is all 4 lane with 55-65 speeds to totally bypass ALL the Atlanta congestion. As an alternative for a more peaceful, scenic and relaxing pace get off I75 on GA 53 in Calhoun south of Chattanooga. Go west to Rome and take the east bypass around Rome to US 27 south to LaGrange. At LaGrange catch I-185 south to Columbus, then the GA 520 SE through Ft Benning (it become US 82 at Dawson ) then take GA520/US82 to Tifton and get back on I-75. All good road . A few towns and plenty to see and do but no traffic . Not that much longer time wise and a reasonable pathway-- especially if you hit ATL when its a parking lot.