Without a superstar (phrase is used loosely), the rest of the line becomes average, if even that. When you have even a single guy on there that almost has to be double teamed, it keeps the rest of the line single covered, aka making it much easier to look better then they are. I would hope Dungy and co. to look into a new line, people who aren't crap.
This is typical of Dungy defenses and the "Tampa 2" With the Bucs he had Sapp, but since Sapp has been gone QB pressure for the Bucs has been a big issue.
Not surprising in the least Indy has the same dynamic.