Point taken.
Stepping away from the division winner aspect of the discussion, my original point was that holding teams under 20 this year will be really tough with the teams we will be playing. Colts will have Luck back to his normal self (most likely), NE looks better on offense, Green Bay is Green Bay, Tennessee is likely to be better on offense, same with Jax (debatable), San Diego looks better already, Minnesota is probably going to be better. It doesn't look easy.
Having said that, a lot of our issue on D last year had to do with our offense not producing and therefore putting the defense on the field too often. We should probably be better in that respect this year with Osweiler and Miller moving the chains more often.
Anyway, I know we are all keen to improve our offense but a starting safety and a coverage linebacker should be high priorities, as high as most offensive priorities, this year.