The customers are the ones driving the freight to Ground. Memphis doesn't have to come up with any merging plans, cross-over equipment, etc. They see the price of ground vs. express and they pick ground, unless it absolutely, positively needs to be there overnight by 1030 or 1500--or it's international. Hang out at your front counter or at a Fedex Office or a pack and ship place and listen to the customers. They pick price, not color of the uniform.
Ground has gotten pretty good-comparable to UPS, don't know-but in my experience on my route I know that I get the same stuff everyday, same shippers. These shippers are still choosing us-probably out of laziness or "it's just the way it's always been done." That will change, as it already has with a few national volume shipper accounts. Don't expect Memphis to stop it, either.