I believe that eventually other *A programs will start giving credit for F fares, once AV communicates these changes to their *A partners. But who knows when that will happen.. Its not that other programs are recognizing F as a "cheap" business class fare and purposely excluding it from crediting. (Like P fares on LH flights). It is that as far as *A partners are concerned F is basically a non-existing fare class on AV since AV has not informed any of their partners about these changes. Previously K was the "cheap" business class fare on Avianca and most partners were giving the same credit for K as they were for J,C,D. (Turkish Airlines was creditng 150% equally for all business fares J,C,D,A,K)
Maybe someone needs to point this out to directly to Star Alliance so that they can convince Avianca to fix this.