It seems to me, in this business climate, most companies make a decision to provide only a degree of quality that is just good enough.
There was a time when excellence and exceeding expectations was a key factor in success. Many of today most successful companies (not just FedEx) have determined the highest profitability comes from providing service and/or products that are "just good enough", at the target price point. Again, "good enough", but not too good.
Once upon a time, purchase transportation was viewed as a weak link in the chain. One worth avoiding, even at higher cost. We gained market share by being consistently better. Today, the market accepts a less remarkable product, in exchange for lower cost. Proof can be found in the success AND higher profit per shipment for our "economy" product as opposed to priority.
I'd expect that until/unless the market changes that P/T will increase if/when cost effective, since it has been determined to be "good enough".