The point is that MPI shouldn't try to subvert what the underlying Fortran compilers are doing. If they're consolidating down to a single name, so should we. And if you have platforms where they're not, great -- don't consolidate to a single name (e.g., mpifort) on those platforms, and/or rely on downstream vendors (e.g., IBM) to do the right things for their platforms/compiler suites (e.g., the mpif* scripts that IBM is apparently generating).
I agree that this is right for most cases, eg ifort, ftn and gfortran. I recall PGI has language-named variants. Not sure what you think should be done there. That is a case that actually matters to MPICH and OpenMPI builds from source by users (as opposed to IBM on BG).
The Absoft compiler also has different names af77 and af90. Rajeev