Paragraph 1)
I recall a game being 7-6 this season in Dallas. Also refer to 1995 season. A garbage Commanders roster, led by such greats like Gus Frerrote and Heath Shuler swept the would be Superbowl champion Cowboys. That Cowboys team was great inspite of the dismal coaching of Barry Switzer, and nobody in the NFL could compete, which is not the case in 2010 with the Cowboys vs the rest of the NFL
2) There have been all of 2 moves made this offseason and nobody knows in what ways Shanahan has adjusted his coaching style or strategy. Shanahan also starts with a better D then he had in his 3 years in Denver, the one year he got good D play he ended up in the AFC title game (not saying the Commanders are going to the NFC title game or even the playoffs for the next 2 seasons)
Essentially, there isn't enough of a book of Shanny in DC to say any "cons" The pro is he is not Jim Zorn