'Sacrificial' is the key word. Titanium wears through in short order so prolonging the life of the blade with the tape is still the only way. When you add up all the CTF's for T&V you would have to do per blade change it is the best current solution even if it's not the quietest.
Admittedly an additional removable titanium strip if only down the worst of the wearing portion would be a better fit in all senses but i don't see that happening anytime soon.