I was contemplating the roll back to .52 as well, but decided to switch to Voxel instead. I'm running 61SF now, and zero complaints.I finally realized my connections problems were from the updated firmware. I rolled back to 1.0.2.52 and so far so good. It does seem like an issue that should have been caught by QA. Maybe it's time to pull the trigger on the Voxel switch that I have been contemplating for so long...
2.4 and 5 GHz are both stable, and it's got the stubby add-on built in so I had to do literally no work other than running one command to get it enabled.