"feathered" edges is generally not a sign of defective tires.

it usually is a sign of either 1) incorrect front suspension alignment or 2) consistent aggressive driving.

With my truck, the first set of tires I put on it wore prematurely...they had feathered edges and excessive tread wear on the outside. The problem was front end alignment.

Also, the statement that the tires are directional and cannot be rotated is not based on fact. If the front end alignment is correct, you simply rotate them front to rear rather than in an "X".

As for the characteristic of wet performance gradually changing with tread wear....that's one of those "Well duh" issues. As the tire wears (be it abnormal or normal wear) the tread grooves get more shallow. When the tread grooves get more shallow, wet traction may decrease. This is true of any tire not just Goodyears.

Lastly, I now have about 20,000 miles on a set of TripleTreds and have no sign of feathered edges.