I feel like I just heard this exact argument from the NFLN or somewhere else.
But yes, offense equals ratings. Its not exciting for a casual fan to have to sit there and watch a bunch of teams go 3 and out for 50 minutes.
The league's damage has been done. Not only does the league have this to deal with, but how do they explain all of the NFL players/employees that have been arrested within the past four days? Two current NFL players entering rehab. And, of course, "integrity of the game" scandals involving Atlanta's admission of piping in crowd noise and the alleged texting communication by the Cleveland Browns in-game. This, amid tampering between teams and a third, unnamed "integrity of the game" scandal.
Not saying that the league is to blame for all of these instances, but they've got lots of crap to account for. Goodell is in the hot seat probably now more than ever, and he seemingly no longer has the support of his #1 supporter.