I agree with your take on the Pack. Their defense has been very solid the past few years and their ground game has dominated at times. As you said, they're also getting healthy at the right time of year.
Only way Dallas takes a step closer to that level is if they continue to get consistent pressure on the QB and run better behind their constantly shifting OL.
I'm not sure the last three weeks against WFT and Big Blew showed enough and it looks like the Cards might be in a late season swoon (though losing to Rams and Colts ain't the end of the world).
I also wouldn't want to face the Colts run game or D but Wentz in the playoffs is a complete unknown.