I may have the same thing ?? Had the wheels rebalanced...but no change. I'm thinking it's the half worn tires ?? There's no steering wheel vibration really, but kind of an overall sense of something slightly out of balance causing increased road noise in that 60-80 mph range. Maybe the vibration issue is all in my head & it's just increased road noise from the tires. Noted the difference when I realized Fred is much louder than Wilma....

I remember once replacing the Bridgestones on my wife's RAV4 with some super cheap Runway tires & being astounded by how much quieter the vehicle was...ya think 60% worn tires can become much louder?