MNF really jumped the shark when it jumped over to ESPN. It just lost the mystique it had and it feels like it has been "cheapened" by it's transition over to a cable network. There just seems to be something "less special" about a sporting event broadcast on cable versus on the "Big 4" networks.
This started happening long before the ABC/ESPN swap.
Remember ABC /ESPN are the same company so if they wanted to, they could have kept the teams together as they were before that.
Jimbo