Detroit played Carolina last week... probably the best run defense in the NFL; and even though we faced 2 very tough run defenses - except for a stretch here and there, we haven't been able to run the ball for years.
I would have more confidence in our run game if it did not seem that MM had reverted to his norm, i.e. his 3 zone running plays; but alas, it would seem that he has. It will take him half the season to remember what file cabinet he stuffed those power running plays in - until then, we're gonna struggle... especially against a very stout Lions run defense.
As for our secondary - we played a very anemic passing offense in the Jets, and the Seahawks are very ordinary. Eric Decker broke free for an easy TD; Lockett might not score another TD his entire career... so based on past performance, and until our DB's prove they can hold their own - yes, our secondary sucks.
Stretches like 2013, where they were 4th in the league with 4.7 ypc and the running game carried them for most of the season?
When the going gets weird, the weird turn pro ~Hunter S.