I dont know because I agree that Mussina shouldn't be borderline but that's the perception out there.
I dont agree with comparing players if you're comparing guys to others that don't deserve to be in the HOF. Nobody should be putting SS's up to Rizzuto or 2b up to Mazerowski and saying well his numbers are as good or better. This is elite players. I kind of take the Bill Simmons line. If you dont know in your heart, if you have to question or try to talk yourself into a guy than they almost surely aren't elite enough.
I just don't see how the eye test really works in baseball for the HOF. As for comparing guys, you have to compare players to see where they rank, and then see if that's HOF worthy, and no I don't think comparing favorably to the worst players in the hall should get one in. The problem with the know in your heart approach is that there are going to be borderline guys, there have to be with something like this, and if you say none of the borderline guys deserve it, then there will still be borderline guys, they'll just be a notch or two higher. With borderline players, you have to do real analysis IMO, not just base it off your heart or the eye test.