I love the Avon front!! I went from a still good Metz that was a little cupped to the Avon so it was a much better comparison and it is a big change.
As you say the profile is better so it smoother when rolls off the center and easier partly because of the height change.
As good as the Avon pair are, the ExedraMaX rear and Avon front is really the best setup imho. The stone rear is a hell of a lot better in the wet and cold, in the dry and warm they’re about the same. Unfortunately they don’t make a matching front for us.
When you’ve killed that rear I can’t recommend trying out a stone Max rear enough, allegedly they get better mileage too.