Corners matter. DL matters more though
i agree, i can't name any of the corners from the NYG squad that beat the Pats in the 2007 Super Bowl but i remember most of their DL.
Corners matter these days, esp if you have a Sherman type or other top flight guy, however the rules are such now that DBs can't touch a WR and Deion would have a hard time these days having the kind of impact he did back then. He DEFINITELY would've gotten called for that PI against Irvin and we'd have had 4 straight.
DL does two things and effects two ways where DBs really only affect one. A good DL can stuff the run AND rush the passer while DBs are generally only good for passing plays. A great DL can dictate to the offense what plays it can/can't run and then force throws that it can also greatly affect with a good rush.