the argument is probably total defense v. takeaways - if you're a lucky fan - your team is tops in both!
Funny enough though - and I could be wrong - Ints for the regular season weren't exactly an indicator as to who was looking "the best" and who was a real playoff team
First playoff team visible was Colts at #6 with Ints.(tied with Browns). Then Bengals at #12. Falcons at #19 and so on.
Leaders in total sacks were a bit better of an indicator of a playoff team with 4 teams in top 10 in sacks. Forced fumbles was the best indicator I found so far with 7 playoff teams in top 10 in forcing fumbles.
I'd say getting to the QB and dislodging the ball are #1 priorities for the defense next season - the INTs have to be secondary to the pass-rush and disrupting immediately at line of scrimmage