Seems the USPS Ground Advantage mainly hurt the first class stuff. Lumping it all one is taking the long time for the far zones where as they used to get there in 2 days when combined with the priority.
Used it on 35 package Monday , 27 arrived by today with a few more out for delivery
out of the 8 that didn't make it yet 6 are first class weights. The heavier stuff 2lbs+ made it quicker it seems.