So seeing as how I don't expect us to lose 16 linemen again, the answer to your question is no I do not see any evidence that points to us going 8-8 again
Well lets look at this schedule mathematically. The NFL uses last season's end of season record to determine strength of schedule which currently has Dallas at 18th in the NFL. Now of course some teams that were under 500 last season could be over 500 this season and some teams over 500 last season could be under 500 this season, but the random fluctuations should even out and give us a good "rough estimate" of how many games we can "expect" to win.
We play 8 games against teams over 500 and 8 games against teams under 500 this season, which has us 18th in the NFL in strength of schedule. Like I said, not an exact science, but its a good baseline to start with.
Now we can apply Garrett's career winning percentage against teams under 500 and against teams below 500 to get the "expected" number of wins and losses based on historical data. Garrett has been interim/head coach for 56 regular season games and therefore we have a good sample size. So we can now apply Garrett's career winning percentages to the number of games we have against teams above 500 and below 500, which as stated above is 8 games both ways.
Jason Garrett's career winning percentage against teams 500 or better.........................194.........(.194*8) = 1.5 expected wins
Jason Garrett's career winning percentage against teams under 500..............................920........(.920*8) = 7.3 expected wins
So that is 8.8 wins "expected" mathematically based on Garrett's career winning percentages and our 18th place strength of schedule for 2014.