I can't answer to the "new" abrasion strip as I haven't flown them. If it fixes the problems it is a good thing that has been a long time comeing. Filling and fareing was a good "mod" to the abrasion strip, but by no means a fix to get back to the performance of the Boeing blades.
The other odd thing about those blades was the honeycomb patch that slightly deformed the outer portion of the blade. It had to have some aerodynamic effects on the blade.
If the "new" abrasion strips get you back to no more than 2 or 3 degrees of down tab in the major sections of the blades I would say they are better, but if you are still having to use nearly 5 degrees of down tab I would say no.