It’s a needlessly pedantic argument in any case. We have assembled one of the most costly defenses in the league (money+draft capital invested). We’ve had an average-to-below average SoS for the season on the whole, with one of the easiest schedules in the league for the back end of the season. When looking at just the offenses we’ve faced, we should’ve had one of the easiest slates in the league. And now our best-case interpretation has us at 30th in defensive DVOA rather than 32nd. What difference does that make beyond being pedantic in an attempt to be able to claim “technically correct” in an internet argument? Who cares? 30th vs 32nd is wholly immaterial no matter how you slice it.
I think we’re all mature enough here to be able to let it be when someone says “we have the worst defense in the league,” instead of being unable to resist correcting them with a “well ACKSHUALLY we only have the 30th ranked defense, so it’s really not the very worst in the league”