I love TA but I think his poor field vision causes the need to scramble much of the time. A better passer makes reads/checkdowns quicker and gets rid of the ball. There were RBs open in the flats on more than one occasion that he never looked at. TA is much more elusive than a traditional pocket passer but there is also an art to having a feel for the pocket and TA doesn't have that most of the time. And lets be honest, the TD to SM Jr was bad Tommy that caught a break. That pass was an answered prayer.
To your point, yes we lose that game without TA...without a doubt. But the whole dynamic changes when you have a QB that can read defenses and exploit all open receivers.
This post isn't meant to slam Armstrong, but rather to point out that the approach is different when you have a QB with a different skillset.