I think it is interesting that Amazon believes that local/regional carriers will do a better job at peak.
We have a regional based out of the city where I live. This year, their HQ building was short 75 drivers. The only volume that they were delivering on time was business volume. Residential volume was delivered 1-2 weeks late. We picked up a couple of accounts that shipped stuff via the regional, then had to reship via UPS because it was sitting in a trailer at the regional and they would not say for sure when it would be delivered.
What I see happening is Amazon diverting volume to regionals, peak rolls around and UPS and FE say, "Divert regional volume back to us (by signing a new contract) and we'll help you out."